New submission from Nate Soares:
Here's an example test that fails:
def test_isabstract_during_init_subclass(self):
from abc import ABCMeta, abstractmethod
isabstract_checks = []
class AbstractChecker(metaclass=ABCMeta):
def __init_subclass__(cls):
abstract_checks.append(inspect.isabstract(cls))
class AbstractClassExample(AbstractChecker):
@abstractmethod
def foo(self):
pass
class ClassExample(AbstractClassExample):
def foo(self):
pass
self.assertEqual(isabstract_checks, [True, False])
To run the test, you'll need to be on a version of python where bpo-29581 is
fixed (e.g., a cpython branch with https://github.com/python/cpython/pull/527
merged) in order for __init_subclass__ to work with ABCMeta at all in the first
place. I have a simple patch to inspect.isabstract that fixes this, and will
make a PR shortly.
----------
messages: 289682
nosy: So8res
priority: normal
severity: normal
status: open
title: inspect.isabstract does not work on abstract base classes during
__init_subclass__
versions: Python 3.7
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29822>
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