In [1]:

    

import sys
import io


    

In [2]:

    

io?


    

In [3]:

    

io??


    

In [4]:

    

# IPython Quick Refence
%quickref


    

In [5]:

    

# Python Refence
help()


    

    




Welcome to Python 2.7!  This is the online help utility.

If this is your first time using Python, you should definitely check out
the tutorial on the Internet at http://docs.python.org/2.7/tutorial/.

Enter the name of any module, keyword, or topic to get help on writing
Python programs and using Python modules.  To quit this help utility and
return to the interpreter, just type "quit".

To get a list of available modules, keywords, or topics, type "modules",
"keywords", or "topics".  Each module also comes with a one-line summary
of what it does; to list the modules whose summaries contain a given word
such as "spam", type "modules spam".

help> 

You are now leaving help and returning to the Python interpreter.
If you want to ask for help on a particular object directly from the
interpreter, you can type "help(object)".  Executing "help('string')"
has the same effect as typing a particular string at the help> prompt.

In [ ]:

    

%pdoc io.FileIO


    

In [7]:

    

%pdef io.OpenWrapper


    

    




No definition header found for io.OpenWrapper

In [8]:

    

%psource io


    

In [9]:

    

%pfile io


    

In [10]:

    

# Browse an object with tab
sys


    

    
Out[10]:





<module 'sys' (built-in)>

In [ ]:

    

# Shift-tab to get more information about a method
open()


    

In [12]:

    

# Listing all magic
%lsmagic


    

    
Out[12]:





Available line magics:
%alias  %alias_magic  %autocall  %automagic  %autosave  %bookmark  %cat  %cd  %clear  %colors  %config  %connect_info  %cp  %debug  %dhist  %dirs  %doctest_mode  %ed  %edit  %env  %gui  %hist  %history  %install_default_config  %install_ext  %install_profiles  %killbgscripts  %ldir  %less  %lf  %lk  %ll  %load  %load_ext  %loadpy  %logoff  %logon  %logstart  %logstate  %logstop  %ls  %lsmagic  %lx  %macro  %magic  %man  %matplotlib  %mkdir  %more  %mv  %notebook  %page  %pastebin  %pdb  %pdef  %pdoc  %pfile  %pinfo  %pinfo2  %popd  %pprint  %precision  %profile  %prun  %psearch  %psource  %pushd  %pwd  %pycat  %pylab  %qtconsole  %quickref  %recall  %rehashx  %reload_ext  %rep  %rerun  %reset  %reset_selective  %rm  %rmdir  %run  %save  %sc  %store  %sx  %system  %tb  %time  %timeit  %unalias  %unload_ext  %who  %who_ls  %whos  %xdel  %xmode

Available cell magics:
%%!  %%HTML  %%SVG  %%bash  %%capture  %%debug  %%file  %%html  %%javascript  %%latex  %%perl  %%prun  %%pypy  %%python  %%python2  %%python3  %%ruby  %%script  %%sh  %%svg  %%sx  %%system  %%time  %%timeit  %%writefile

Automagic is ON, % prefix IS NOT needed for line magics.

In [13]:

    

# Measuring Performance
%timeit range(1000)
%timeit xrange(1000)


    

    




100000 loops, best of 3: 13.9 µs per loop
10000000 loops, best of 3: 198 ns per loop

In [14]:

    

%%timeit
# Measuring Block Performance

for x in range(1000):
    y=x+1


    

    




10000 loops, best of 3: 65.1 µs per loop

In [15]:

    

%%timeit
# Measuring Block Performance

for x in xrange(1000):
    y=x+1


    

    




1000 loops, best of 3: 488 µs per loop

In [16]:

    

# Reset (Delete) all variables
%reset


    

    




Once deleted, variables cannot be recovered. Proceed (y/[n])? n
Nothing done.

In [17]:

    

%%bash
echo $PATH


    

    




/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin

In [18]:

    

3+5


    

    
Out[18]:





8

In [21]:

    

In[18]


    

    
Out[21]:





u'3+5'

In [22]:

    

Out[18]


    

    
Out[22]:





8

In [23]:

    

_ + 3


    

    
Out[23]:





11

In [24]:

    

_ - 4


    

    
Out[24]:





7