Basics of python-introduction
Python is designed for easy interaction between a user and the system. It goes with an inter active function known as a shell or listener. The shell provides a prompt (usually something like »>) and waits for you to type in a Python program or expression. Then it will calculate the expression you given, and print out the number of the result. So, for example, a communication with the Python shell might look like this:
>>> 5 + 5
10
>>> x = 6
>>> x
6
>>> x + x
12
>>> y = 'hi'
>>> y + y
'hihi'
>>>
So, you can use Python as a fancy calculator. And as you describe your own functions in Python, you may use the shell to check them or use them to compute useful results.