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IDLE: Wrong highlighting when previous line ends with backslash #140334
Description
Bug report
Bug description:
Code like this
str. \
formatshould be coloured the same way as
str.formatRight now IDLE doesn't respect the slash before the newline and thinks that every new line is a new statement.
Similarly in:
x = match if match else \
matchThe last match should be coloured in like a variable and not a keyword.
CPython versions tested on:
CPython main branch
Operating systems tested on:
Linux
Activity
TheLizzard commentedon Oct 19, 2025
I found exactly where the problem is coming from (
Lib/idlelib/colorizer.py@make_pat) and I have a solution that passes all tests. I am working a pull request.[-]IDLE: Wrong highlighting when previous line ends with slash[/-][+]IDLE: Wrong highlighting when previous line ends with backslash[/+]terryjreedy commentedon Oct 20, 2025
@TheLizzard Thank you for a definitely non trivial patch. Will test when I can before looking at Stan's alternative.
@StanFromIreland When I merged to patch to support t-strings, I thought about using the new tokenizer and associated PyREPL code. I made a new issue for this and changed your PR to attach it there.
StanFromIreland commentedon Oct 20, 2025
I think we can merge the patch first, and then look at the larger issue.