Method assert_python_failure

Lib/test/test_interpreters/utils.py:472–475

(self, *argv)

        return stdout, stderr

    def assert_python_failure(self, *argv):
        exitcode, stdout, stderr = self.run_python(*argv)
        self.assertNotEqual(exitcode, 0)
        return stdout, stderr

    def assert_ns_equal(self, ns1, ns2, msg=None):
        # This is mostly copied from TestCase.assertDictEqual.