Method restore

Lib/test/pickletester.py:140–147

(self)

    # Restore previous registration for code.
    def restore(self):
        code = self.code
        curpair = copyreg._inverted_registry.get(code)
        if curpair is not None:
            copyreg.remove_extension(curpair[0], curpair[1], code)
        pair = self.pair
        if pair is not None:
            copyreg.add_extension(pair[0], pair[1], code)

class pickling_metaclass(type):
    def __eq__(self, other):