On Tue, Mar 5, 2019 at 7:26 PM Steven D'Aprano <steve@pearwood.info> wrote:
On Sat, Mar 02, 2019 at 01:47:37AM +0900, INADA Naoki wrote:
If the keys are not strings, it currently works in CPython, but it may not work with other implementations, or future versions of CPython[2].
I don't think so. https://bugs.python.org/issue35105 and https://mail.python.org/pipermail/python-dev/2018-October/155435.html are about kwargs. I think non string keys are allowed for {**d1, **d2} by language.
Is this documented somewhere?
It is not explicitly documented. But unlike keyword argument, dict display supported non-string keys from very old. I believe {3: 4} is supported by Python language, not CPython implementation behavior. https://docs.python.org/3/reference/expressions.html#grammar-token-dict-disp...
Or is there a pronouncement somewhere that it is definitely expected to work in any language calling itself Python?
Thanks,
-- Steven _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
-- Inada Naoki <songofacandy@gmail.com>