"Python Basics Tutorial" Notes Abstraction

Create a function

Document the function, write a string at the beginning of the function, it will be stored as part of the function, this is called a documentation string, such as

def square(x): 'Caculates the square of the number x.'
return x*x

>>> square.__doc__
'Caculates the square of the number x.'

help -- used in the interactive interpreter will get information about the function including it Document string information, such as

>>> help(square)
Help on function square in module __main__:

square(x)
Caculates the square of the number x.

All functions return Something else: When their return value is not required, they return None.

Parameter Magic

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