test_interactiveshell.py 文件源码

def test_unregistering(self):
        err_transformer = ErrorTransformer()
        ip.ast_transformers.append(err_transformer)

        with tt.AssertPrints("unregister", channel='stderr'):
            ip.run_cell("1 + 2")

        # This should have been removed.
        nt.assert_not_in(err_transformer, ip.ast_transformers)