diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/_abcoll.py | 3 | ||||
| -rw-r--r-- | Lib/test/test_collections.py | 10 |
2 files changed, 10 insertions, 3 deletions
diff --git a/Lib/_abcoll.py b/Lib/_abcoll.py index cac06e0..0957553 100644 --- a/Lib/_abcoll.py +++ b/Lib/_abcoll.py @@ -90,7 +90,8 @@ class Iterator(Iterable): @classmethod def __subclasshook__(cls, C): if cls is Iterator: - if any("__next__" in B.__dict__ for B in C.__mro__): + if (any("__next__" in B.__dict__ for B in C.__mro__) and + any("__iter__" in B.__dict__ for B in C.__mro__)): return True return NotImplemented diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py index f3f8b03..02b9dc3 100644 --- a/Lib/test/test_collections.py +++ b/Lib/test/test_collections.py @@ -356,8 +356,14 @@ class TestOneTrickPonyABCs(ABCTestCase): for x in samples: self.assertIsInstance(x, Iterator) self.assertTrue(issubclass(type(x), Iterator), repr(type(x))) - self.validate_abstract_methods(Iterator, '__next__') - self.validate_isinstance(Iterator, '__next__') + self.validate_abstract_methods(Iterator, '__next__', '__iter__') + + # Issue 10565 + class NextOnly: + def __next__(self): + yield 1 + raise StopIteration + self.assertNotIsInstance(NextOnly(), Iterator) def test_Sized(self): non_samples = [None, 42, 3.14, 1j, |