In [1]:

    

locals()


    

    
Out[1]:





{'In': ['', u'locals()'],
 'Out': {},
 '_': '',
 '__': '',
 '___': '',
 '__builtin__': <module '__builtin__' (built-in)>,
 '__builtins__': <module '__builtin__' (built-in)>,
 '__doc__': 'Automatically created module for IPython interactive environment',
 '__name__': '__main__',
 '_dh': [u'/Users/vyin/WorkDocs/work/python-bootcamp'],
 '_i': u'',
 '_i1': u'locals()',
 '_ih': ['', u'locals()'],
 '_ii': u'',
 '_iii': u'',
 '_oh': {},
 '_sh': <module 'IPython.core.shadowns' from '/Users/vyin/anaconda/lib/python2.7/site-packages/IPython/core/shadowns.pyc'>,
 'exit': <IPython.core.autocall.ZMQExitAutocall at 0x10911b390>,
 'get_ipython': <bound method ZMQInteractiveShell.get_ipython of <ipykernel.zmqshell.ZMQInteractiveShell object at 0x1090ba350>>,
 'quit': <IPython.core.autocall.ZMQExitAutocall at 0x10911b390>}

In [13]:

    

def f():
    myvar = 'hello'
    print locals()

f()


    

    




{'myvar': 'hello'}

In [30]:

    

def my_dec(f):
    def new_hello():
        print "DECORATOR START"
        f()
        print "DECORATOR END"

    return new_hello

@my_dec
def hello():
    print 'Original hello!'

hello()


    

    




DECORATOR START
Original hello!
DECORATOR END

In [31]:

    

hello()


    

    




DECORATOR START
Original hello!
DECORATOR END

In [68]:

    

def simple_gen(start, stop):
    for i in range(start, stop):
        yield -i


    

In [70]:

    

g = simple_gen(5, 9)


    

In [75]:

    

next(g)


    

    




---------------------------------------------------------------------------
StopIteration                             Traceback (most recent call last)
<ipython-input-75-5f315c5de15b> in <module>()
----> 1 next(g)

StopIteration: 

In [46]:

    

type(g)


    

    
Out[46]:





generator

In [63]:

    

h = simple_gen()


    

In [67]:

    

next(h)


    

    
Out[67]:





-2

In [76]:

    

import collections


    

In [83]:

    

x = ['a', 'b', 'c', 'b', 'b']
y = collections.Counter(x)


    

In [87]:

    

y.keys()


    

    
Out[87]:





['a', 'c', 'b']

In [91]:

    

y.most_common(1)


    

    
Out[91]:





[('b', 3)]

In [101]:

    

x = collections.defaultdict(object)


    

In [99]:

    

x['dummy']


    

    
Out[99]:





<object at 0x108fd7b50>

In [103]:

    

import datetime


    

In [104]:

    

t = datetime.time(14, 59, 23)


    

In [105]:

    

t


    

    
Out[105]:





datetime.time(14, 59, 23)

In [106]:

    

t + 2


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-106-e2644ca8ba6c> in <module>()
----> 1 t + 2

TypeError: unsupported operand type(s) for +: 'datetime.time' and 'int'

In [109]:

    

t.isoformat()


    

    
Out[109]:





'14:59:23'

In [117]:

    

if None:
    print "None"
else:
    print "Something"


    

    




Something

In [121]:

    

def f():
    return None

if None:
    print "None"
else:
    print "Something"


    

    




Something

In [122]:

    

partition("abcde", 'c')


    

    




---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-122-cd2aa0985687> in <module>()
----> 1 partition("abcde", 'c')

NameError: name 'partition' is not defined

In [123]:

    

'abcde'.partition('c')


    

    
Out[123]:





('ab', 'c', 'de')

In [124]:

    

s = 'abcde'


    

In [125]:

    

s.partition('z')


    

    
Out[125]:





('abcde', '', '')

In [126]:

    

s.partition('d')


    

    
Out[126]:





('abc', 'd', 'e')

In [127]:

    

s1 = {1,2,3}
s2 = {1,4,5}


    

In [128]:

    

s1.difference(s2)


    

    
Out[128]:





{2, 3}

In [129]:

    

s1


    

    
Out[129]:





{1, 2, 3}

In [130]:

    

s2


    

    
Out[130]:





{1, 4, 5}

In [131]:

    

s1.difference_update(s2)


    

In [132]:

    

s1


    

    
Out[132]:





{2, 3}

In [133]:

    

s2


    

    
Out[133]:





{1, 4, 5}

In [139]:

    

{k+'$$$':v**2 for k,v in zip(('a','b', 'c'), range(3,6))}


    

    
Out[139]:





{'a$$$': 9, 'b$$$': 16, 'c$$$': 25}

In [140]:

    

[1,2] + [3,4]


    

    
Out[140]:





[1, 2, 3, 4]

In [144]:

    

print [1,2].extend([3,4])


    

    




None

In [145]:

    

x = [1,2]
y = [3,4]


    

In [148]:

    

print x.extend(y)


    

    




None

In [147]:

    

print x


    

    




[1, 2, 3, 4]

In [ ]: