python / python/mypy

Set the config file’s location with an environment variable.

Open
#17,683 0 comments 2 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

feature
Dominant language
Python
Stars
20.6k
Forks
3.3k
PR merge metrics
PR metrics pending

Description

Feature
Similar to setting MYPYPATH:
Allow setting mypy’s config file location with an environment variable, e.g.:
$ export MYPYCFG=~/work/settings/mypy.ini

Pitch
Most, if not all, of my Python projects use the same mypy.ini file, so currently I run mypy using:
mypy --config-file $MYPYCFG .

It would be easier if one could just run mypy, with mypy using $MYPYCFG as the config file setting.

What I do not know is whether anyone besides me would benefit from such a feature, so this might be too big an ask.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating mypy's command-line configuration handling and its tests; the issue does not name specific files or entry points. Compare the existing --config-file behavior with the proposed MYPYCFG environment variable, and consider the current working-directory invocation as the verification case. Done means mypy can use the environment-provided config without the explicit option.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
cli, tooling
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.