Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
deque is not a subclass of MutableMapping, so the Liskov substitution principle is not related here. deque is not registered as a virtual subclass of MutableMapping and it lacks a number of MutableMapping methods. >>> import collections.abc >>> issubclass(collections.deque, collections.abc.MutableMapping) False >>> sorted(set(dir(collections.abc.MutableMapping)) - >>> set(dir(collections.deque))) ['_MutableMapping__marker', '__abstractmethods__', '__module__', '__slots__', '_abc_impl', 'get', 'items', 'keys', 'popitem', 'setdefault', 'update', 'values'] ---------- nosy: +serhiy.storchaka _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41409> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
