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I think the set operation of dict_keys accepts any iterable by accident. There is an issue for it: https://bugs.python.org/issue38538 On Wed, Dec 4, 2019 at 4:32 PM Serhiy Storchaka <storchaka@gmail.com> wrote:
03.12.19 21:04, Andrew Barnert via Python-ideas пише:
On Dec 3, 2019, at 02:00, Serhiy Storchaka <storchaka@gmail.com> wrote:
What it will return if implement | for dicts? It should be mentioned in the PEP. It should be tested with a preliminary implementation what behavior is possible and more natural.
What is there to document or test here? There’s no dicts involved in either operator, only a set and a key view, both of which are set types and implement set union.
Oh, sorry, it was a wrong example. Here is the right one:
{(1, 2): 3}.keys() | {4: 5} {(1, 2), 4}
{4: 5} | {(1, 2): 3}.keys() {(1, 2), 4}
How the results will change after implementing PEP 584? It all should be considered in the PEP. Note that dictkeys.__or__ does not return NotImplemented (there is an issue for this), so the PEP can require more wider changes than just adding __or__, __ror__ and __ior__ to dict. _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/OYUGN5... Code of Conduct: http://python.org/psf/codeofconduct/
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