decorator with argument

decorators1.py

def change_doc(docstring):
    def decorator(func):
        func.__doc__ = docstring
        return func
    return decorator

@change_doc('new docstring 1')
def foo():
    '''original docstring'''
    pass

print foo.__doc__
print foo

bar = change_doc('new docstring 2')(foo)

print bar.__doc__
print bar