python / python/mypy

mypy.api.run causes an EncodingWarning

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bug
Dominant language
Python
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Description

import mypy.api

mypy.api.run([__file__])
$ PYTHONWARNDEFAULTENCODING=1 venv/bin/python sscce.py 
/tmp/tmp.H5cwz0dU9s/sscce.py:3: EncodingWarning: 'encoding' argument not specified
  mypy.api.run([__file__])

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Research direction

Start at the mypy.api.run entry point and reproduce the report with PYTHONWARNDEFAULTENCODING=1 using the shown script. Trace which operation emits the warning, then verify that calling mypy.api.run no longer produces an EncodingWarning under that environment.

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Assessment

Tech stack
python
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
45/100

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