Steven D'Aprano added the comment: On Sun, May 08, 2016 at 04:24:59AM +0000, Joshua Morton wrote:
> Following the comments in python ideas [1] [...] > > [1] https://mail.python.org/pipermail/python-ideas/2016-April/039469.html Am I missing something? I don't see anything resembling a consensus that the behaviour of dict views is a bug in that thread, in fact I hardly see any discussion about this specific behaviour. (Other related topics are discussed in more depth.) I don't think it is a bug for views to permit non-set arguments with binops: py> {'a': 1, 'b': 2}.keys() & ['a', 'c'] {'a'} I think it is a matter of taste. My own taste tells me that sets should be more restrictive, only accepting other [frozen]sets or subclasses, but views should be less restrictive, and perform more duck-typing of "set-like" objects, including lists. No, I can't justify it, except by an appeal to status quo: that's how it is now, and I don't think that changing it is worth breaking backwards compatibility. ---------- nosy: +steven.daprano _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26973> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
