New submission from Stefan Krah: The new PEP-3118 equality definition from #15573 that is based on element-wise comparisons breaks the equality-hash invariant:
>>> from _testbuffer import ndarray >>> x = ndarray([1,2,3], shape=[3], format='f') >>> y = ndarray([1,2,3], shape=[3], format='B') >>> a = memoryview(x) >>> b = memoryview(y) >>> a == b True >>> hash(a) == hash(b) False >>> ---------- assignee: skrah messages: 169398 nosy: Arfrever, christian.heimes, georg.brandl, haypo, loewis, mark.dickinson, meador.inge, ncoghlan, pitrou, skrah priority: normal severity: normal stage: needs patch status: open title: memoryview: equality-hash invariant type: behavior versions: Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15814> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
