Update dmypy/client.py: Enable ANSI color codes for windows cmd#19088
Merged
Conversation
I still use windows cmd, and the color codes used by dmypy do not work on there. instead printing a bunch of codes like ←[37m ←[39;49;00ms. However, for whatever reason you can fix this simply by calling os.system("") once. (The main mypy program works fine, presumably because it makes an os system call somewhere before it prints.)
Contributor
|
According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
hauntsaninja
left a comment
Collaborator
There was a problem hiding this comment.
I think in mypy proper we do this with the initialize_win_colors thing in mypy util
Contributor
Author
|
Thanks for the info! However, I've now tried importing and calling initialize_win_colors in various ways, from directly running the kernel32.SetConsoleMode function to instantiating the FancyFormatter class, but it actually seemed to have the opposite effect: it gets rid of the ansi codes, but just displays plain, black-and-white text. Regular mypy continues to work as normal. |
hauntsaninja
approved these changes
May 15, 2025
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
I still use windows cmd, and the color codes emitted by dmypy do not work on there. instead printing a bunch of codes like ←[37m ←[39;49;00ms. However, for whatever reason you can fix this simply by calling os.system("") once. (The main mypy program works fine, presumably because it makes an os system call somewhere before it prints.)
I did not write a test of this, as that seems difficult and unnecessary. Instead, I manually tested it, and it worked great.