04.10.18 11:56, Steven D'Aprano пише:
While keyword arguments have to be identifiers, using **kwargs allows arbitrary strings which aren't identifiers:py> def spam(**kwargs): .... print(kwargs) .... py> spam(**{"something arbitrary": 1, '\n': 2}) {'something arbitrary': 1, '\n': 2} There is some discussion on Python-Ideas on whether or not that behaviour ought to be considered a language feature, an accident of implementation, or a bug. Can we get some guidence on this please?
This is an implementation detail. Currently CPython doesn't ensure that keyword argument names are identifiers for performance reasons. But this can be changed in future versions or in other implementations.
_______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
