Doc Strings : Documentation « Function « Python Tutorial

1. Python Tutorial
2. Function
3. Documentation

def func(params):
    """Do something with a dictionary of parameters.
    Parameter 1 is blah
    Parameter 2 is blah
    """

class Foo :
    """ This is a document string for the Foo class.
    """
    x = 1


dir(Foo)
print Foo.__doc__