Method set

recipes/Python/577580_weak_reference_map/recipe-577580.py:34–41

(self, key, value)

        self.__backref = {}
        
    def set(self, key, value):
        ikey, ival = id(key), id(value)
        self.__map[ikey] = (ival, 
                            _ref(key, partial(self.forget_key, ikey))
                            )
        if ival not in self.__valmemo:
            self.__valmemo[ival] = _ref(value, partial(self.forget_value, ival))
        self.__backref.setdefault(ival, set()).add(ikey)
            
    def get(self, key, **kwargs):
        ikey = id(key)