# -*- coding:utf-8 -*-

def method(prototype):

class MethodDescriptor(object):

__slots__ = ['func', 'bound_funcs']

def __init__(self, func):

self.func = func

self.bound_funcs = {}

def __get__(self, obj, type=None):

if obj!=None:

try:

return self.bound_funcs[obj,type]

except:

ret = self.bound_funcs[obj,type] = prototype(

self.func.__get__(obj, type))

return ret

return MethodDescriptor