New submission from Jonathan Fine <jfine2...@gmail.com>:
The identifiers True, False, None and __debug__ are keywords in the language. For example >>> __debug__ = __debug__ SyntaxError: assignment to keyword 1. The page constants.html incorrectly says then are in the built-in namespace. Some of them were, once. 2. The list keyword.kwlist does not contain __debug__. (Problem in Lib/keyword.py.) 3. https://docs.python.org/3/reference/datamodel.html for None, NotImplemented, etc. 4. There may be other places that need looking at. See also: https://github.com/jfine2358/py-jfine2358/blob/master/docs/none-is-special.md Credit: The __debug__ problem arises from Steve D'Aprano's message https://mail.python.org/pipermail/python-ideas/2018-August/052917.html The std lib contains a test that this correctly raises SyntaxError: def f(*, x=lambda __debug__:0): pass ---------- assignee: docs@python components: Documentation messages: 323904 nosy: docs@python, jfine2358 priority: normal severity: normal status: open title: docs: keywords are special - eg constants.html type: enhancement versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34464> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
