デコレータ

#!/usr/bin/env python
# *-# -*- coding: utf-8 -*-

def cake():
    return "cake"

print cake() #-> cake


def chocolate(func):
    return lambda:"chocolate " + func()

def special(func):
    return lambda:"special " + func()

@chocolate
def cake():
    return "cake"

print cake() #-> chocolate cake

@special
@chocolate
def doughnut():
    return "doughnut"

print doughnut() #-> special chocolate doughnut

いまいち使いどころがわかんないデコ。