In [1]:

    

import os

# Third-party
from astropy.io import ascii, fits
import astropy.coordinates as coord
import astropy.table as at
import astropy.units as u
import matplotlib as mpl
import matplotlib.pyplot as pl
import numpy as np
%matplotlib inline

from gary.units import galactic
import gary.coordinates as gc

from ophiuchus import vcirc, vlsr
import ophiuchus.potential as op


    

In [2]:

    

mw_pot = op.load_potential('static_mw')


    

In [3]:

    

rc_age = ascii.read("/Users/adrian/projects/brucewillis/data/redclump_catalogue_apw.txt")
rc_age.rename_column('name', 'APOGEE_ID')
rc_bovy = at.Table(fits.getdata("/Users/adrian/projects/brucewillis/data/apogee-rc-DR12.fits", 1))


    

In [4]:

    

rc = at.join(rc_age, rc_bovy, keys='APOGEE_ID')
len(rc_age), len(rc_bovy), len(rc)


    

    
Out[4]:





(17065, 19937, 17065)

In [5]:

    

print(rc.colnames)


    

    




['APOGEE_ID', 'radius', 'z', 'FeH', 'alphaFe', 'age', 'chi2_reduced', 'APSTAR_ID', 'ASPCAP_ID', 'TELESCOPE', 'LOCATION_ID', 'FIELD', 'J', 'J_ERR', 'H', 'H_ERR', 'K', 'K_ERR', 'RA', 'DEC', 'GLON', 'GLAT', 'APOGEE_TARGET1', 'APOGEE_TARGET2', 'TARGFLAGS', 'NVISITS', 'COMMISS', 'SNR', 'STARFLAG', 'STARFLAGS', 'ANDFLAG', 'ANDFLAGS', 'VHELIO_AVG', 'VSCATTER', 'VERR', 'VERR_MED', 'STABLERV_CHI2', 'STABLERV_RCHI2', 'STABLERV_CHI2_PROB', 'EXTRATARG', 'PARAM', 'FPARAM', 'PARAM_COV', 'FPARAM_COV', 'ELEM', 'FELEM', 'ELEM_ERR', 'FELEM_ERR', 'TEFF', 'LOGG', 'PARAM_M_H', 'PARAM_ALPHA_M', 'TEFF_ERR', 'LOGG_ERR', 'PARAM_M_H_ERR', 'PARAM_ALPHA_M_ERR', 'ASPCAP_CHI2', 'ASPCAP_CLASS', 'ASPCAPFLAG', 'ASPCAPFLAGS', 'PARAMFLAG', 'AL_H', 'CA_H', 'C_H', 'FE_H', 'K_H', 'MG_H', 'MN_H', 'NA_H', 'NI_H', 'N_H', 'O_H', 'SI_H', 'S_H', 'TI_H', 'V_H', 'AL_H_ERR', 'CA_H_ERR', 'C_H_ERR', 'FE_H_ERR', 'K_H_ERR', 'MG_H_ERR', 'MN_H_ERR', 'NA_H_ERR', 'NI_H_ERR', 'N_H_ERR', 'O_H_ERR', 'SI_H_ERR', 'S_H_ERR', 'TI_H_ERR', 'V_H_ERR', 'AL_H_FLAG', 'CA_H_FLAG', 'C_H_FLAG', 'FE_H_FLAG', 'K_H_FLAG', 'MG_H_FLAG', 'MN_H_FLAG', 'NA_H_FLAG', 'NI_H_FLAG', 'N_H_FLAG', 'O_H_FLAG', 'SI_H_FLAG', 'S_H_FLAG', 'TI_H_FLAG', 'V_H_FLAG', 'ELEM_CHI2', 'ELEMFLAG', 'WASH_M', 'WASH_M_ERR', 'WASH_T2', 'WASH_T2_ERR', 'DDO51', 'DDO51_ERR', 'IRAC_3_6', 'IRAC_3_6_ERR', 'IRAC_4_5', 'IRAC_4_5_ERR', 'IRAC_5_8', 'IRAC_5_8_ERR', 'IRAC_8_0', 'IRAC_8_0_ERR', 'WISE_4_5', 'WISE_4_5_ERR', 'TARG_4_5', 'TARG_4_5_ERR', 'AK_TARG', 'AK_TARG_METHOD', 'WASH_DDO51_GIANT_FLAG', 'WASH_DDO51_STAR_FLAG', 'ALL_VISITS', 'VISITS', 'ALL_VISIT_PK', 'VISIT_PK', 'J0', 'H0', 'K0', 'METALS', 'ALPHAFE', 'ADDL_LOGG_CUT', 'RC_DIST', 'RC_DM', 'RC_GALR', 'RC_GALPHI', 'RC_GALZ', 'STAT', 'INVSF', 'PMRA', 'PMDEC', 'PMRA_ERR', 'PMDEC_ERR', 'PMMATCH', 'GALVR', 'GALVT', 'GALVZ', 'PMRA_PPMXL', 'PMDEC_PPMXL', 'PMRA_ERR_PPMXL', 'PMDEC_ERR_PPMXL', 'PMMATCH_PPMXL', 'GALVR_PPMXL', 'GALVT_PPMXL', 'GALVZ_PPMXL']

In [6]:

    

for colname in rc.colnames:
    if rc[colname].dtype.name not in ['float64', 'float32']:
        continue
    
    ix = np.isclose(rc[colname], -9999.)
    rc[colname][ix] = np.nan


    

In [71]:

    

rv_c = coord.ICRS(ra=rc['RA']*u.degree, dec=rc['DEC']*u.degree, distance=rc['RC_DIST']*u.kpc)
distance_err = rc['RC_DIST'] * u.kpc * 0.05

rv = rc['VHELIO_AVG']*u.km/u.s
rv_err = np.sqrt(rc['VERR']**2 + rc['VSCATTER']**2)*u.km/u.s

pm_ra = rc['PMRA']*u.mas/u.yr
pm_ra_err = rc['PMRA_ERR']*u.mas/u.yr

pm_dec = rc['PMDEC']*u.mas/u.yr
pm_dec_err = rc['PMDEC_ERR']*u.mas/u.yr

pm_ra[pm_ra.value < -9999.] = np.nan
pm_dec[pm_dec.value < -9999.] = np.nan
pm_ra_err[pm_ra_err.value < -9999.] = np.nan
pm_dec_err[pm_dec_err.value < -9999.] = np.nan


    

In [8]:

    

xyz = rv_c.transform_to(coord.Galactocentric).cartesian.xyz
vxyz = gc.vhel_to_gal(rv_c, rv=rv, pm=(pm_ra, pm_dec))


    

In [9]:

    

L = np.cross(xyz, vxyz, axis=0)


    

In [10]:

    

E = mw_pot.total_energy(x=xyz.decompose(galactic).value, 
                        v=vxyz.decompose(galactic).value)


    

In [102]:

    

Lxy = np.sqrt(L[0]**2 + L[1]**2)
Lz = L[2]
Ltot = np.sqrt(np.sum(L**2, axis=0))


    

In [157]:

    

import gary.dynamics as gd
from scipy.signal import argrelmax, argrelmin


    

In [169]:

    

w0 = gd.CartesianPhaseSpacePosition(pos=xyz, vel=vxyz)
orbits = mw_pot.integrate_orbit(w0, dt=0.5, nsteps=2000)


    

In [179]:

    

t = orbits.t

allfreqs = np.zeros((3,len(rc)))
for i in range(len(rc)):
    cyl,_ = orbits[:,i].represent_as(coord.CylindricalRepresentation)

    freqs = []
    for name in ['rho','phi','z']:
        i_max = argrelmax(getattr(cyl,name).value)[0]
        i_min = argrelmin(getattr(cyl,name).value)[0]
        T_max = t[i_max[1:]] - t[i_max[:-1]]
        T_min = t[i_min[1:]] - t[i_min[:-1]]
        freqs.append(2*np.pi/np.median((np.median(T_max).value, np.median(T_min).value)))
    allfreqs[:,i] = freqs


    

    




/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/numpy/core/_methods.py:59: RuntimeWarning: Mean of empty slice.
  warnings.warn("Mean of empty slice.", RuntimeWarning)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/numpy/core/_methods.py:70: RuntimeWarning: invalid value encountered in double_scalars
  ret = ret.dtype.type(ret / rcount)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/numpy/lib/function_base.py:3142: RuntimeWarning: Invalid value encountered in median
  RuntimeWarning)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/scipy/signal/_peak_finding.py:68: RuntimeWarning: invalid value encountered in greater
  results &= comparator(main, plus)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/scipy/signal/_peak_finding.py:69: RuntimeWarning: invalid value encountered in greater
  results &= comparator(main, minus)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/scipy/signal/_peak_finding.py:68: RuntimeWarning: invalid value encountered in less
  results &= comparator(main, plus)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/scipy/signal/_peak_finding.py:69: RuntimeWarning: invalid value encountered in less
  results &= comparator(main, minus)

In [77]:

    

def nan_median_absolute_deviation(x):
    return np.nanmedian(np.abs(x - np.nanmedian(x)))


    

In [86]:

    

ntrials = 128
nsamples = 1024
E_MADs = []
L_MADs = []
for i in np.random.randint(len(rc), size=ntrials):
    this_c = rv_c[i]
    
    ra = np.zeros(nsamples) + this_c.ra.degree
    dec = np.zeros(nsamples) + this_c.dec.degree
    distance = np.random.normal(this_c.distance.value, distance_err.value[i], size=nsamples)
    sample_c = coord.ICRS(ra=ra*u.degree, dec=dec*u.degree, distance=distance*u.kpc)
    sample_xyz = sample_c.transform_to(coord.Galactocentric).cartesian.xyz
    
    sample_pm_ra = np.random.normal(pm_ra.value[i], pm_ra_err.value[i], size=nsamples)*u.mas/u.yr
    sample_pm_dec = np.random.normal(pm_dec.value[i], pm_dec_err.value[i], size=nsamples)*u.mas/u.yr
    sample_rv = np.random.normal(rv.value[i], rv_err.value[i], size=nsamples)*u.km/u.s
    sample_vxyz = gc.vhel_to_gal(sample_c, rv=sample_rv, pm=(sample_pm_ra, sample_pm_dec))
    
    sample_L = np.cross(sample_xyz, sample_vxyz, axis=0)
    sample_Ltot = np.sqrt(np.sum(sample_L**2, axis=0))
    sample_E = mw_pot.total_energy(x=sample_xyz.decompose(galactic).value, 
                                   v=sample_vxyz.decompose(galactic).value)
    
    E_MADs.append(nan_median_absolute_deviation(sample_E))
    L_MADs.append(nan_median_absolute_deviation(sample_Ltot))
    
E_MADs = np.array(E_MADs)
L_MADs = np.array(L_MADs)


    

    




/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:689: RuntimeWarning: All-NaN slice encountered
  warnings.warn("All-NaN slice encountered", RuntimeWarning)

In [96]:

    

E_scale = 1.48 * np.nanmedian(E_MADs) # MAD to std dev
L_scale = 1.48 * np.nanmedian(L_MADs) # MAD to std dev


    

In [92]:

    

pl.figure(figsize=(8,6))
pl.scatter(Lxy, rc['age'], marker='o', alpha=0.24,
           c=rc['alphaFe'], cmap='viridis')
pl.xscale('log')
cb = pl.colorbar()
cb.set_label(r'[$\alpha/{\rm Fe}$]')
pl.xlabel('$L_{xy}$')
pl.ylabel('Age [Gyr]')


    

    
Out[92]:





<matplotlib.text.Text at 0x207c332b0>






    

In [128]:

    

pl.figure(figsize=(8,6))
pl.scatter(np.log10(-E), Lxy, marker='o', alpha=0.24,
           c=rc['age'], cmap='viridis')
pl.xlim(-1.5, -0.5)
pl.yscale('log')
cb = pl.colorbar()
cb.set_label('Age [Gyr]')
pl.xlabel(r'$\log_{10}(-E)$')
pl.ylabel('$L_{xy}$')


    

    




/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/ipykernel/__main__.py:2: RuntimeWarning: invalid value encountered in log10
  from ipykernel import kernelapp as app






    
Out[128]:





<matplotlib.text.Text at 0x1207e0588>






    

In [183]:

    

pl.figure(figsize=(8,6))
pl.scatter(allfreqs[0], allfreqs[2], marker='o', alpha=0.24,
           c=rc['age'], cmap='viridis')
pl.xlim(0., 0.1)
pl.ylim(0., 0.1)
cb = pl.colorbar()
cb.set_label('Age [Gyr]')
pl.xlabel(r'$\Omega_R$')
pl.ylabel(r'$\Omega_z$')


    

    
Out[183]:





<matplotlib.text.Text at 0x1641c7470>






    

In [184]:

    

pl.figure(figsize=(8,6))
pl.scatter(allfreqs[0], allfreqs[1], marker='o', alpha=0.24,
           c=rc['age'], cmap='viridis')
pl.xlim(0., 0.1)
pl.ylim(0., 0.1)
cb = pl.colorbar()
cb.set_label('Age [Gyr]')
pl.xlabel(r'$\Omega_R$')
pl.ylabel(r'$\Omega_\phi$')


    

    
Out[184]:





<matplotlib.text.Text at 0x1641d9320>






    

In [94]:

    

from sklearn.cluster import KMeans
from astropy.stats import median_absolute_deviation


    

In [185]:

    

feature_cols = ['FeH', 'alphaFe', 'age'] + [x for x in rc.colnames if x.endswith('_H') and x!='PARAM_M_H']
feature_names = ['E', 'Lxy', 'Lz', 'Ltot', 'omegaR', 'omegaPhi', 'omegaZ'] + feature_cols
print(feature_names)


    

    




['E', 'Lxy', 'Lz', 'Ltot', 'omegaR', 'omegaPhi', 'omegaZ', 'FeH', 'alphaFe', 'age', 'AL_H', 'CA_H', 'C_H', 'FE_H', 'K_H', 'MG_H', 'MN_H', 'NA_H', 'NI_H', 'N_H', 'O_H', 'SI_H', 'S_H', 'TI_H', 'V_H']

In [100]:

    

logE = np.log10(-E / E_scale)
pl.hist(logE[np.isfinite(logE)], bins=64)
pl.xlim(1, 1.5)


    

    




/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/ipykernel/__main__.py:1: RuntimeWarning: invalid value encountered in log10
  if __name__ == '__main__':






    
Out[100]:





(1, 1.5)






    

In [112]:

    

logLtot = np.log10(Ltot / L_scale)
logLxy = np.log10(Lxy / L_scale)
logLz = np.log10(-Lz / L_scale) # ignore retrograde for now :(

pl.hist(logLtot[np.isfinite(logLtot)], bins=64, alpha=0.4)
pl.hist(logLxy[np.isfinite(logLxy)], bins=64, alpha=0.4)
_ = pl.hist(logLz[np.isfinite(logLz)], bins=64, alpha=0.4)


    

    




/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/ipykernel/__main__.py:3: RuntimeWarning: invalid value encountered in log10
  app.launch_new_instance()






    

In [186]:

    

X = np.zeros((len(rc), 7 + len(feature_cols))) # E, Lxy, Lz, Ltot, omegaR, omegaPhi, omegaZ + chemistry
X[:,0] = logE
X[:,1] = logLxy
X[:,2] = logLz
X[:,3] = logLtot
X[:,4:7] = allfreqs.T / 0.01
for i,col in enumerate(feature_cols, 7):
    if '_H' in col:
        scale = np.nanmedian(rc['{}_ERR'.format(col)])
    else:
        scale = 1.
    X[:,i] = rc[col] / scale
    
# For now, only take stars with non-NAN values
non_nan = np.all(np.isfinite(X), axis=1)
X = X[non_nan]


    

In [187]:

    

X.shape


    

    
Out[187]:





(13352, 25)

In [188]:

    

n_clusters = 64
ntrials = 16

scores = np.zeros(ntrials)
for i in range(ntrials):
    km = KMeans(n_clusters=n_clusters, random_state=i)
    km.fit(X)
    scores[i] = km.score(X)


    

In [189]:

    

km = KMeans(n_clusters=n_clusters, random_state=scores.argmax())
km.fit(X)
km.score(X)


    

    
Out[189]:





-385918.77526273881

In [190]:

    

nmembers_per_cluster = np.zeros(km.n_clusters)
for k in range(km.n_clusters):
    members = km.labels_ == k
    nmembers_per_cluster[k] = members.sum()


    

In [191]:

    

pl.hist(nmembers_per_cluster)


    

    
Out[191]:





(array([  6.,   7.,  12.,   8.,   5.,   5.,   8.,   6.,   2.,   5.]),
 array([   1. ,   48.3,   95.6,  142.9,  190.2,  237.5,  284.8,  332.1,
         379.4,  426.7,  474. ]),
 <a list of 10 Patch objects>)






    

In [192]:

    

def plot_clusters(xfeature, yfeature):
    fig,ax = pl.subplots(1,1,figsize=(6,6))

    ix0 = feature_names.index(xfeature)
    ix1 = feature_names.index(yfeature)

    for k in range(km.n_clusters):
        members = km.labels_ == k
        cluster_center = km.cluster_centers_[k]
        l, = ax.plot(X[members, ix0], X[members, ix1], marker='.', ls='none')
    #     ax.plot(cluster_center[ix0], cluster_center[ix1], 'o', ls='none', color=l.get_color(),
    #             markeredgecolor='k', markersize=6)

    pl.xlabel(xfeature)
    pl.ylabel(yfeature)


    

In [193]:

    

plot_clusters("E", "Lxy")


    

In [194]:

    

plot_clusters("age", "E")


    

In [202]:

    

plot_clusters("omegaR", "Ltot")


    

In [205]:

    

alpha = 0.4 

for k in range(km.n_clusters):
    members = km.labels_ == k
#     if members.sum() < nmembers_threshold:
#         continue
    
    this_c = rv_c[non_nan][members].transform_to(coord.Galactic)
    this_galcen = this_c.transform_to(coord.Galactocentric)
    this_xyz = this_galcen.represent_as(coord.CartesianRepresentation).xyz
    this_cyl = this_galcen.represent_as(coord.CylindricalRepresentation)
    
    fig,axes = pl.subplots(1,4,figsize=(20,5))
    fig.suptitle("{}, {} stars".format(k,members.sum()), y=1.01, fontsize=20)
    axes[0].plot(this_c.l.degree, this_c.b.degree, marker='.', ls='none', alpha=alpha)
    axes[0].set_xlim(360, 0)
    axes[0].set_ylim(-90, 90)
    axes[0].set_xlabel("l [deg]")
    axes[0].set_ylabel("b [deg]")
    
    axes[1].plot(-8., 0., marker='o', color='r')
    axes[1].plot(this_xyz[0].value, this_xyz[1].value, marker='.', ls='none', alpha=alpha)
    axes[1].set_xlim(-20, 0)
    axes[1].set_ylim(-10, 10)
    axes[1].set_xlabel("x [kpc]")
    axes[1].set_ylabel("y [kpc]")
    
    axes[2].plot(8., 0., marker='o', color='r')
    axes[2].plot(this_cyl.rho.value, this_cyl.z.value, marker='.', ls='none', alpha=alpha)
    axes[2].set_xlim(4,18)
    axes[2].set_ylim(-7, 7)
    axes[2].set_xlabel("R [kpc]")
    axes[2].set_ylabel("z [kpc]")
    
    ix0 = feature_names.index('omegaR')
    ix1 = feature_names.index('omegaZ')
    axes[3].plot(X[members,ix0], X[members,ix1], marker='.', ls='none', alpha=alpha)
    axes[3].set_xlim(0,10)
    axes[3].set_ylim(0,10)
    axes[3].set_xlabel(r"$\Omega_R$")
    axes[3].set_ylabel(r"$\Omega_z$")
    
    fig.tight_layout()


    

    




/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/pyplot.py:516: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
  max_open_warning, RuntimeWarning)






    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    













    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2228                 orientation=orientation,
   2229                 bbox_inches_restore=_bbox_inches_restore,
-> 2230                 **kwargs)
   2231         finally:
   2232             if bbox_inches and restore_bbox:

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x12f4493c8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x1412f5ef0>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x13dff56a0>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x1414c1c50>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x11417feb8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x14159e4a8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x13a77da90>






    













    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2228                 orientation=orientation,
   2229                 bbox_inches_restore=_bbox_inches_restore,
-> 2230                 **kwargs)
   2231         finally:
   2232             if bbox_inches and restore_bbox:

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x141260470>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x11fb49f98>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x135302eb8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x131c1ef60>






    













    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2228                 orientation=orientation,
   2229                 bbox_inches_restore=_bbox_inches_restore,
-> 2230                 **kwargs)
   2231         finally:
   2232             if bbox_inches and restore_bbox:

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x1366e8f28>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x12ed3f5f8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x135dfaa58>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x1405aa2b0>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x12feaadd8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x12e846630>






    













    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2228                 orientation=orientation,
   2229                 bbox_inches_restore=_bbox_inches_restore,
-> 2230                 **kwargs)
   2231         finally:
   2232             if bbox_inches and restore_bbox:

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x11f384cf8>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x162b90048>






    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    335                 pass
    336             else:
--> 337                 return printer(obj)
    338             # Finally look for special method names
    339             method = _safe_get_formatter_method(obj, self.print_method)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in <lambda>(fig)
    207         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
    208     if 'retina' in formats or 'png2x' in formats:
--> 209         png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
    210     if 'jpg' in formats or 'jpeg' in formats:
    211         jpg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'jpg', **kwargs))

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in retina_figure(fig, **kwargs)
    123 def retina_figure(fig, **kwargs):
    124     """format a figure as a pixel-doubled (retina) PNG"""
--> 125     pngdata = print_figure(fig, fmt='retina', **kwargs)
    126     w, h = _pngxy(pngdata)
    127     metadata = dict(width=w//2, height=h//2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/IPython/core/pylabtools.py in print_figure(fig, fmt, bbox_inches, **kwargs)
    115 
    116     bytes_io = BytesIO()
--> 117     fig.canvas.print_figure(bytes_io, **kw)
    118     data = bytes_io.getvalue()
    119     if fmt == 'svg':

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2176                     orientation=orientation,
   2177                     dryrun=True,
-> 2178                     **kwargs)
   2179                 renderer = self.figure._cachedRenderer
   2180                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in print_png(self, filename_or_obj, *args, **kwargs)
    525 
    526     def print_png(self, filename_or_obj, *args, **kwargs):
--> 527         FigureCanvasAgg.draw(self)
    528         renderer = self.get_renderer()
    529         original_dpi = renderer.dpi

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    472 
    473         try:
--> 474             self.figure.draw(self.renderer)
    475         finally:
    476             RendererAgg.lock.release()

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/figure.py in draw(self, renderer)
   1131         dsu.sort(key=itemgetter(0))
   1132         for zorder, a, func, args in dsu:
-> 1133             func(*args)
   1134 
   1135         renderer.close_group('figure')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2302 
   2303         for zorder, a in dsu:
-> 2304             a.draw(renderer)
   2305 
   2306         renderer.close_group('axes')

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1118         self._update_label_position(ticklabelBoxes, ticklabelBoxes2)
   1119 
-> 1120         self.label.draw(renderer)
   1121 
   1122         self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     59     def draw_wrapper(artist, renderer, *args, **kwargs):
     60         before(artist, renderer)
---> 61         draw(artist, renderer, *args, **kwargs)
     62         after(artist, renderer)
     63 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in draw(self, renderer)
    747 
    748         with _wrap_text(self) as textobj:
--> 749             bbox, info, descent = textobj._get_layout(renderer)
    750             trans = textobj.get_transform()
    751 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/text.py in _get_layout(self, renderer)
    359                 w, h, d = renderer.get_text_width_height_descent(clean_line,
    360                                                         self._fontproperties,
--> 361                                                         ismath=ismath)
    362             else:
    363                 w, h, d = 0, 0, 0

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/backends/backend_agg.py in get_text_width_height_descent(self, s, prop, ismath)
    232         if ismath:
    233             ox, oy, width, height, descent, fonts, used_characters = \
--> 234                 self.mathtext_parser.parse(s, self.dpi, prop)
    235             return width, height, descent
    236 

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in parse(self, s, dpi, prop)
   3103             fontset_class = self._font_type_mapping.get(fontset.lower())
   3104             if fontset_class is not None:
-> 3105                 font_output = fontset_class(prop, backend)
   3106             else:
   3107                 raise ValueError(

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    678 
    679     def __init__(self, *args, **kwargs):
--> 680         self._stix_fallback = StixFonts(*args, **kwargs)
    681 
    682         TruetypeFonts.__init__(self, *args, **kwargs)

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, *args, **kwargs)
    912 
    913     def __init__(self, *args, **kwargs):
--> 914         TruetypeFonts.__init__(self, *args, **kwargs)
    915         self.fontmap = {}
    916         for key, name in six.iteritems(self._fontmap):

/Users/adrian/anaconda/envs/three/lib/python3.5/site-packages/matplotlib/mathtext.py in __init__(self, default_font_prop, mathtext_backend)
    564 
    565         filename = findfont(default_font_prop)
--> 566         default_font = self.CachedFont(FT2Font(filename))
    567         self._fonts['default'] = default_font
    568         self._fonts['regular'] = default_font

TypeError: First argument must be a path or file object reading bytes





    






<matplotlib.figure.Figure at 0x1300f8438>