delayable.py

"""Example of adding attributes to a function using a decorator."""

import time


def delayable(func):
    def _delayer(delay, *args, **kwargs):
        time.sleep(delay)
        return func(*args, **kwargs)
    setattr(func, 'delay', _delayer)
    return func


@delayable
def say_hello(name):
    print('Hello', name)


say_hello('Anne')
say_hello.delay(5, 'Dan')
say_hello.delay(10, 'Torben')