Method copy

Lib/weakref.py:337–343

(self)

        self.data[ref(key, self._remove)] = value

    def copy(self):
        new = WeakKeyDictionary()
        for key, value in self.data.copy().items():
            o = key()
            if o is not None:
                new[o] = value
        return new

    __copy__ = copy