test_types_basic.py 文件源码

def test_adapt_subtype_3(self):
        from psycopg2.extensions import adapt, register_adapter, AsIs

        class A:
            pass

        class B(A):
            pass

        register_adapter(A, lambda a: AsIs("a"))
        try:
            self.assertEqual(b"a", adapt(B()).getquoted())
        finally:
            del psycopg2.extensions.adapters[A, psycopg2.extensions.ISQLQuote]