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Fix 'WriteToConn' object has no attribute 'flush' #16801

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merged 2 commits into from Jan 30, 2024

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meshy
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@meshy meshy commented Jan 19, 2024

WriteToConn replaces stdout and stderr to capture output, but causes issues because it doesn't implement the TextIO API (as expected of sys.stdout and sys.stderr).

By stubbing the rest of the TextIO API we prevent issues with other code which uses more of the API than we had previously accounted for.

Fixes #16678

This default isn't used anywhere in the codebase.

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@meshy meshy marked this pull request as ready for review January 19, 2024 22:55
mypy/dmypy_util.py Outdated Show resolved Hide resolved
This class replaced stdout and stderr to capture output, but caused
issues because it didn't implement the full API of sys.stdout and
sys.stderr.

By fully stubbing the TextIO API we prevent issues with other code
which uses more of the API than we had previously accounted for.

Fixes python#16678
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅

@hauntsaninja hauntsaninja merged commit 06b01c8 into python:master Jan 30, 2024
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Thanks for the fix!

@meshy meshy deleted the fix-WriteToConn-type branch January 30, 2024 09:30
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MyPy daemon version 1.7.0+ crashes if colorama is installed and reporting (cubertura) is used.
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