Class Unpickler

Lib/test/pickletester.py:1298–1300

    def test_custom_find_class(self):
        def loads(data):
            class Unpickler(self.unpickler):
                def find_class(self, module_name, global_name):
                    return (module_name, global_name)
            return Unpickler(io.BytesIO(data)).load()

        self.assertEqual(loads(b'cmath\nlog\n.'), ('math', 'log'))