We’ve just uploaded mypy 1.6 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance improvements and bug fixes. You can install it as follows:
python3 -m pip install -U mypy
You can read the full documentation for this release on Read the Docs.
Introduce Error Subcodes for Import Errors
Mypy now uses the error code import-untyped if an import targets an installed library that doesn’t support static type checking, and no stub files are available. Other invalid imports produce the import-not-found error code. They both are subcodes of the import error code, which was previously used for both kinds of import-related errors.
Use --disable-error-code=import-untyped to only ignore import errors about installed libraries without stubs. This way mypy will still report errors about typos in import statements, for example.
If you use --warn-unused-ignore or --strict, mypy will complain if you use # type: ignore[import] to ignore an import error. You are expected to use one of the more specific error codes instead. Otherwise, ignoring the import error code continues to silence both errors.
This feature was contributed by Shantanu (PR 15840, PR 14740).
Remove Support for Targeting Python 3.6 and Earlier
Running mypy with --python-version 3.6, for example, is no longer supported. Python 3.6 hasn’t been properly supported by mypy for some time now, and this makes it explicit. This was contributed by Nikita Sobolev (PR 15668).
Selective Filtering of --disallow-untyped-calls Targets
Using --disallow-untyped-calls could be annoying when using libraries with missing type information, as mypy would generate many errors about code that uses the library. Now you can use --untyped-calls-exclude=acme, for example, to disable these errors about calls targeting functions defined in the acme package. Refer to the documentation for more information.
This feature was contributed by Ivan Levkivskyi (PR 15845).
Improved Type Inference between Callable Types
Mypy now does a better job inferring type variables inside arguments of callable types. For example, this code fragment now type checks correctly:
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Updates the requirements on mypy to permit the latest version.
Changelog
Sourced from mypy's changelog.
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Commits
3534bac
Remove +dev from versionf36ea01
Fix async iterator body stripping (#15491)ba7887b
Revert "Fix spurious errors on builtins.open (#15161)" (#15508)16fe5da
Fix readthedocs build (#15437)9b327d1
Use consistent anchors for error codes (#15435)32abe02
docs: ref redirector (#15432)e5a5b33
Unbreak CI (#15505)81d01aa
Fix PEP 561 editable install test case (#15493)eba351e
Add pip as test requirement for PEP 660 editable installs (#15482)9faffe8
Bump typing_extensions dependency (#15488)You can trigger a rebase of this PR by commenting
@dependabot rebase
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