pip install ipython
sudo apt-get install ipython  # ubuntu

ipython

ipython -h

?
%quickref
help()
object?
object??

In [23]: import itertools

In [24]: itertools.
itertools.chain                          itertools.groupby 
itertools.combinations                   itertools.ifilter 
itertools.combinations_with_replacement  itertools.ifilterfalse

In [15]: files = !ls

In [16]: files
Out[16]: ['demo_script.py', 'ipy', 'ipy.html', 'ipy.org']

In [25]: 56 * 8903
Out[25]: 498568

In [26]: _ * 12
Out[26]: 5982816

In [27]: _ + 1
Out[27]: 5982817

In [28]: %hist

In [3]: %lsmagic
Out[3]: 
Available line magics:
%aimport  %alias  %alias_magic  %autocall  %autoindent  %automagic

Available cell magics:
%%!  %%HTML  %%SVG  %%bash  %%capture  %%debug  %%file  %%html 

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

In [4]: %automagic

Automagic is OFF, % prefix IS needed for line magics.

In [5]: %colors
UsageError: %colors: you must specify a color scheme. See '%colors?'

In [6]: %colors lightbg

In [2]: %run test.py
bangpypers

In [3]: %edit
IPython will make a temporary file named: /tmp/ipython_edit_SLR3Je/ipython_edit_4wRmT3.py
Editing... done. Executing edited code...
a
Out[3]: "print('a')\n"

In [1]: x = 1 

In [2]: y = 2

In [3]: def f():
   ...:     print('a')
   ...:     

In [4]: f()
a

In [5]: %save test.py 1-4

In [6]: %timeit x = 1 + 2
10000000 loops, best of 3: 52.8 ns per loop

In [7]: %timeit -n 1 x = 1 + 2
1 loops, best of 3: 954 ns per loop

In [8]: %timeit -n 1 -r 5 x = 1 + 2
1 loops, best of 5: 954 ns per loop

In [11]: %paste
%timeit -n 1 x = 1 + 2

## -- End pasted text --
1 loops, best of 3: 954 ns per loop

In [12]: %pastebin 1-12
Out[12]: u'https://gist.github.com/570a427bc1735107d70c

In [14]: def add(x, y):
   ....:     return x + y
   ....: 

In [15]: /add 1,2
Out[15]: 3

In [16]: %autocall
Automatic calling is: Smart

In [17]: add 1,2
-------> add(1,2)
Out[17]: 3

In [18]: def foo(s):
   ....:     return s
   ....: 

In [19]: foo('bangpypers')
Out[19]: 'bangpypers'

In [20]: ,foo bangpypers
Out[20]: 'bangpypers'

In [24]: import func

In [25]: func.foo()
old value

In [26]: %load_ext autoreload

In [27]: %autoreload 2

In [28]: func.foo()
new value

ipython profile create anand

# add config to ~/.ipython/profile_anand/ipython_config.py

ipython --profile=anand

pip install ptpython

ptipython