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Raise errors on unbound TypeVars with values #15732

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merged 4 commits into from
Jul 21, 2023
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Completes a TODO item :)

Refs #15724

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Diff from mypy_primer, showing the effect of this PR on open source code:

mitmproxy (https://github.com/mitmproxy/mitmproxy)
+ mitmproxy/tools/console/grideditor/base.py:22: error: A function returning TypeVar should receive at least one argument containing the same TypeVar  [type-var]

operator (https://github.com/canonical/operator)
+ ops/pebble.py:245: error: A function returning TypeVar should receive at least one argument containing the same TypeVar  [type-var]

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sobolevn added a commit to sobolevn/operator that referenced this pull request Jul 21, 2023
Hi! While working on python/mypy#15732 our tools detected a misuse of `AnyStr` TypeVar (which is quite common). The proper way is to use `Union` here :)
sobolevn added a commit to sobolevn/mitmproxy that referenced this pull request Jul 21, 2023
Hi! While working on python/mypy#15732 our tools detected a misuse of AnyStr TypeVar (which is quite common). The proper way here is to use `@overload`s :)
mhils pushed a commit to mitmproxy/mitmproxy that referenced this pull request Jul 21, 2023
* Remove incorrect usage of `typing.AnyStr`

Hi! While working on python/mypy#15732 our tools detected a misuse of AnyStr TypeVar (which is quite common). The proper way here is to use `@overload`s :)

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
@sobolevn sobolevn merged commit 14e7768 into master Jul 21, 2023
@sobolevn sobolevn deleted the typevars-with-values branch July 21, 2023 19:27
benhoyt pushed a commit to canonical/operator that referenced this pull request Jul 24, 2023
Hi! While working on python/mypy#15732 our tools
detected a misuse of `AnyStr` TypeVar (which is quite common). The
proper way is to use `Union` here :)
lasting-yang pushed a commit to lasting-yang/mitmproxy that referenced this pull request Aug 2, 2023
* Remove incorrect usage of `typing.AnyStr`

Hi! While working on python/mypy#15732 our tools detected a misuse of AnyStr TypeVar (which is quite common). The proper way here is to use `@overload`s :)

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
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2 participants