diff options
| -rw-r--r-- | Lib/abc.py | 4 | ||||
| -rw-r--r-- | Lib/test/test_abc.py | 14 |
2 files changed, 15 insertions, 3 deletions
diff --git a/Lib/abc.py b/Lib/abc.py index ad5a52313c..f8e0230278 100644 --- a/Lib/abc.py +++ b/Lib/abc.py @@ -56,8 +56,6 @@ class _Abstract(object): """Helper class inserted into the bases by ABCMeta (using _fix_bases()). You should never need to explicitly subclass this class. - - There should never be a base class between _Abstract and object. """ def __new__(cls, *args, **kwds): @@ -69,7 +67,7 @@ class _Abstract(object): if (args or kwds) and cls.__init__ is object.__init__: raise TypeError("Can't pass arguments to __new__ " "without overriding __init__") - return object.__new__(cls) + return super().__new__(cls) @classmethod def __subclasshook__(cls, subclass): diff --git a/Lib/test/test_abc.py b/Lib/test/test_abc.py index f93f3d35be..008d839499 100644 --- a/Lib/test/test_abc.py +++ b/Lib/test/test_abc.py @@ -130,6 +130,20 @@ class TestABC(unittest.TestCase): self.failUnless(issubclass(MyInt, A)) self.failUnless(isinstance(42, A)) + def test_all_new_methods_are_called(self): + class A(metaclass=abc.ABCMeta): + pass + class B: + counter = 0 + def __new__(cls): + B.counter += 1 + return super().__new__(cls) + class C(A, B): + pass + self.assertEqual(B.counter, 0) + C() + self.assertEqual(B.counter, 1) + def test_main(): test_support.run_unittest(TestABC) |