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توضیحات

Flake8 checker for raw literals inside raises.

ویژگی	مقدار
سیستم عامل	-
نام فایل	flake8-errmsg-0.4.0
نام	flake8-errmsg
نسخه کتابخانه	0.4.0
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	-
ایمیل نویسنده	Henry Schreiner <henryschreineriii@gmail.com>
آدرس صفحه اصلی	-
آدرس اینترنتی	https://pypi.org/project/flake8-errmsg/
مجوز	-

# flake8-errmsg [![Actions Status][actions-badge]][actions-link] [![PyPI version][pypi-version]][pypi-link] [![PyPI platforms][pypi-platforms]][pypi-link] ## Intro A checker for flake8 that helps format nice error messages. Currently there are two checks: - **EM101**: Check for raw usage of a string literal in Exception raising. - **EM102**: Check for raw usage of an f-string literal in Exception raising. - **EM103**: Check for raw usage of `.format` on a string literal in Exception raising. The issue is that Python includes the line with the raise in the default traceback (and most other formatters, like Rich and IPython to too). That means a user gets a message like this: ```python sub = "Some value" raise RuntimeError(f"{sub!r} is incorrect") ``` ```pytb Traceback (most recent call last): File "tmp.py", line 2, in <module> raise RuntimeError(f"{sub!r} is incorrect") RuntimeError: 'Some value' is incorrect ``` If this is longer or more complex, the duplication can be quite confusing for a user unaccustomed to reading tracebacks. While if you always assign to something like `msg`, then you get: ```python sub = "Some value" msg = f"{sub!r} is incorrect" raise RunetimeError(msg) ``` ```pytb Traceback (most recent call last): File "tmp.py", line 3, in <module> raise RuntimeError(msg) RuntimeError: 'Some value' is incorrect ``` Now there's a simpler traceback, less code, and no double message. If you have a long message, this also often formats better when using Black, too. Reminder: Libraries should produce tracebacks with custom error classes, and applications should print nice errors, usually _without_ a traceback, unless something _unexpected_ occurred. An app should not print a traceback for an error that is known to be triggerable by a user. ## Options There is one option, `--errmsg-max-string-length`, which defaults to 0 but can be set to a larger value. The check will ignore string literals shorter than this length. This option is supported in configuration mode as well. This will only affect string literals and not f-strings. This option is also supported when running directly, without flake8. ## Usage Just add this to your `.pre-commit-config.yaml` `flake8` check under `additional_dependencies`. If you use `extend-select`, you should need no other config. You can also manually run this check (without flake8's `noqa` filtering) via script entry-point (`pipx run flake8-errmsg <files>`) or module entry-point (`python -m flake8_errmsg <files>` when installed). ## FAQ Q: Why Python 3.10+ only? <br/> A: This is a static checker and for developers. Developers and static checks should be on 3.10 already. And I was lazy and match statements are fantastic for this sort of thing. And the AST module changed in 3.8 anyway. Q: What other sorts of checks are acceptable? <br/> A: Things that help with nice errors. For example, maybe requiring `raise SystemExit(n)` over `sys.exit`, `exit`, etc. Possibly adding a check for `warnings.warn` without setting `stacklevel` to something (usually 2).  [actions-badge]: https://github.com/henryiii/flake8-errmsg/workflows/CI/badge.svg [actions-link]: https://github.com/henryiii/flake8-errmsg/actions [pypi-link]: https://pypi.org/project/flake8-errmsg/ [pypi-platforms]: https://img.shields.io/pypi/pyversions/flake8-errmsg [pypi-version]: https://img.shields.io/pypi/v/flake8-errmsg

نیازمندی

مقدار	نام
xtr	flake8;
xtr	pytest>=7;
xtr	pytest>=7;

زبان مورد نیاز

مقدار	نام
>=3.10	Python

نحوه نصب

نصب پکیج whl flake8-errmsg-0.4.0:

pip install flake8-errmsg-0.4.0.whl

نصب پکیج tar.gz flake8-errmsg-0.4.0:

pip install flake8-errmsg-0.4.0.tar.gz