puid_map.py 文件源码

def __setitem__(self, key, value):
        if self.get(key) != value:
            if key in self:
                self.del_value(self[key])
            if value in self._reversed:
                del self[self.get_key(value)]
            self._reversed[value] = key
            if PY2:
                return UserDict.__setitem__(self, key, value)
            else:
                return super(TwoWayDict, self).__setitem__(key, value)