decorator4method.py

import functools

# decorator for method?!
class Cache(object):
    def __init__(self, func):
        self.func = func
        self.cache = {}

    def __call__(self, *args):
        if args not in self.cache:
            self.cache[args] = self.func(*args)
        return self.cache[args]

    def __repr__(self):
        return self.func.__doc__

    def __get__(self, obj, objtype):
        return functools.partial(self.__call__, obj)

cache = Cache
class C(object):
    @cache
    def main(self):
        pass