Issue 26306: Can't create abstract tuple (original) (raw)

Issue26306

Created on 2016-02-08 12:21 by Jack Hargreaves, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (3)
msg259839 - (view) Author: Jack Hargreaves (Jack Hargreaves) Date: 2016-02-08 12:21
When creating an abstract class, subclassing tuple causes check for instantiation of an abstract class to be bypassed. See the associated stackoverflow question -- http://stackoverflow.com/questions/35267954/mix-in-of-abstract-class-and-namedtuple from abc import abstractmethod, ABCMeta class AbstactClass(tuple, metaclass=ABCMeta): @abstractmethod def some_method(self): pass # following should throw a TypeError, but doesn't AbstactClass()
msg260193 - (view) Author: Terry J. Reedy (terry.reedy) * (Python committer) Date: 2016-02-12 19:21
3.2 to 3.4 only get security fixes
msg266294 - (view) Author: Luiz Poleto (luiz.poleto) * Date: 2016-05-25 03:45
Same as reported on issue #5996. Apparently this happens not only with tuple but with any builtin type. There is a patch on that issue but there hasn't been any activity since 2011.
History
Date User Action Args
2022-04-11 14:58:27 admin set github: 70494
2016-05-25 13:19:26 r.david.murray set status: open -> closedsuperseder: abstract class instantiable when subclassing built-in typesresolution: duplicatestage: test needed -> resolved
2016-05-25 03:45:06 luiz.poleto set nosy: + luiz.poletomessages: +
2016-02-12 19:21:43 terry.reedy set nosy: - terry.reedy
2016-02-12 19:21:30 terry.reedy set versions: + Python 3.6, - Python 3.2, Python 3.3, Python 3.4nosy: + terry.reedymessages: + components: + Library (Lib)stage: test needed
2016-02-08 14:32:09 maciej.szulik set nosy: + maciej.szulik
2016-02-08 12:21:53 Jack Hargreaves create