Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment: Relevant SO answer : https://stackoverflow.com/a/41861322/2610955
Ref : https://docs.python.org/3/reference/datamodel.html#object.__bool__ > If a class defines neither __len__() nor __bool__(), all its instances are > considered true. I don't know why it's not implemented and the SO answer comments has some discussion. Maybe this can be clarified in the doc. ➜ cpython git:(master) rlwrap ./python Python 3.8.0a0 (heads/master:56868f9, Jul 21 2018, 14:28:31) [GCC 5.4.0 20160609] on linux Type "help", "copyright", "credits" or "license" for more information. >>> from queue import PriorityQueue >>> len(PriorityQueue([1])) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: object of type 'PriorityQueue' has no len() Thanks ---------- nosy: +xtreak _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34180> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
