[New-bugs-announce] [issue34464] docs: keywords are special - eg constants.html
Jonathan Fine
report at bugs.python.org
Wed Aug 22 15:08:50 EDT 2018
New submission from Jonathan Fine <jfine2358 at 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 at python
components: Documentation
messages: 323904
nosy: docs at 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 <report at bugs.python.org>
<https://bugs.python.org/issue34464>
_______________________________________
More information about the New-bugs-announce
mailing list