Interactive Python

Python statements can be run interactively in a Python shell
The ``best'' shell is called IPython
Sample session with IPython: 
Unix/DOS> ipython
...
In [1]:3*4-1
Out[1]:11

In [2]:from math import *

In [3]:x = 1.2

In [4]:y = sin(x)

In [5]:x
Out[5]:1.2

In [6]:y
Out[6]:0.93203908596722629

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