[issue24612] not operator expression raising a syntax error

Change by Andre Roberge : -- nosy: +aroberge ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue24612] not operator expression raising a syntax error

Change by Pablo Galindo Salgado : -- keywords: +patch pull_requests: +26599 stage: -> patch review pull_request: https://github.com/python/cpython/pull/28170 ___ Python tracker

[issue24612] not operator expression raising a syntax error

Pablo Galindo Salgado added the comment: I think the best outcome here is to refine the syntax error. Making it behave a bit better is going to be quite a pain because of how unary "-" and "not" work on the priority level in the grammar. I also don't think that facilitating the

[issue24612] not operator expression raising a syntax error

Irit Katriel added the comment: Reproduced on 3.11: >>> 0 + not 0 File "", line 1 0 + not 0 ^^^ SyntaxError: invalid syntax >>> - not 0 File "", line 1 - not 0 ^^^ SyntaxError: invalid syntax -- nosy: +iritkatriel, pablogsal versions: +Python 3.11 -Python

[issue24612] not operator expression raising a syntax error

Changes by Ezio Melotti : -- nosy: +ezio.melotti versions: +Python 3.5, Python 3.6 -Python 3.4 ___ Python tracker ___

[issue24612] not operator expression raising a syntax error

New submission from candide: Expressions such as a + not b a * not b + not b - not b raise a SyntaxError, for instance : 0 + not 0 File stdin, line 1 0 + not 0 ^ SyntaxError: invalid syntax - not 0 File stdin, line 1 - not 0 ^ SyntaxError: invalid syntax if

[issue24612] not operator expression raising a syntax error

Steven D'Aprano added the comment: On Sat, Jul 11, 2015 at 03:23:53PM +, candide wrote: New submission from candide: Expressions such as a + not b a * not b + not b - not b raise a SyntaxError, for instance : 0 + not 0 File stdin, line 1 0 + not 0 ^

[issue24612] not operator expression raising a syntax error

Serhiy Storchaka added the comment: not not 0 is compiled successful, while + not 0, - not 0, and ~ not 0 are rejected. -- nosy: +benjamin.peterson ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24612

[issue24612] not operator expression raising a syntax error

Stefan Behnel added the comment: Hmm, right. I see your point and also the analogy with yield. I could live with (maybe) giving it a better error message suggesting to use parentheses for clarity and otherwise keeping it a SyntaxError. -- ___

[issue24612] not operator expression raising a syntax error

Stefan Behnel added the comment: It looks like perfectly valid syntax to me and I cannot see why it should be semantically rejected. I disagree that it shouldn't be changed. I think it's a (minor) bug that should eventually get fixed. -- nosy: +scoder

[issue24612] not operator expression raising a syntax error

Matthew Barnett added the comment: not has a lower priority than unary -; this: not a b is parsed as: not (a b) How would you parse: 0 + not 0 + 0 ? Would it be parsed as: 0 + not (0 + 0) ? Similar remarks could apply to yield: 0 + yield 0 which is also a syntax