test_types_basic.py 文件源码

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

        class A(object): pass
        class B(A): pass
        class C(B): pass

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