chore(deps): update dependency mypy to v1 #159
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This PR contains the following updates:
^0.971->^1.0.0Release Notes
python/mypy (mypy)
v1.18.2Compare Source
object.__init__(Stephen Morton, PR 19733)v1.18.1Compare Source
We’ve just uploaded mypy 1.18.1 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:
You can read the full documentation for this release on Read the Docs.
Mypy Performance Improvements
Mypy 1.18.1 includes numerous performance improvements, resulting in about 40% speedup
compared to 1.17 when type checking mypy itself. In extreme cases, the improvement
can be 10x or higher. The list below is an overview of the various mypy optimizations.
Many mypyc improvements (discussed in a separate section below) also improve performance.
Type caching optimizations have a small risk of causing regressions. When
reporting issues with unexpected inferred types, please also check if
--disable-expression-cachewill work around the issue, as it turns off some ofthese optimizations.
Fixed‑Format Cache (Experimental)
Mypy now supports a new cache format used for faster incremental builds. It makes
incremental builds up to twice as fast. The feature is experimental and
currently only supported when using a compiled version of mypy. Use
--fixed-format-cacheto enable the new format, or
fixed_format_cache = Truein a configuration file.We plan to enable this by default in a future mypy release, and we'll eventually
deprecate and remove support for the original JSON-based format.
Unlike the JSON-based cache format, the new binary format is currently
not easy to parse and inspect by mypy users. We are planning to provide a tool to
convert fixed-format cache files to JSON, but details of the output JSON may be
different from the current JSON format. If you rely on being able to inspect
mypy cache files, we recommend creating a GitHub issue and explaining your use
case, so that we can more likely provide support for it. (Using
MypyFile.read(binary_data)to inspect cache data may be sufficient to supportsome use cases.)
This feature was contributed by Ivan Levkivskyi (PR 19668, 19735, 19750, 19681, 19752, 19815).
Flexible Variable Definitions: Update
Mypy 1.16.0 introduced
--allow-redefinition-new, which allows redefining variableswith different types, and inferring union types for variables from multiple assignments.
The feature is now documented in the
--helpoutput, but the feature is still experimental.We are planning to enable this by default in mypy 2.0, and we will also deprecate the
older
--allow-redefinitionflag. Since the new behavior differs significantly fromthe older flag, we encourage users of
--allow-redefinitionto experiment with--allow-redefinition-newand create a GitHub issue if the new functionality doesn'tsupport some important use cases.
This feature was contributed by Jukka Lehtosalo.
Inferred Type for Bare ClassVar
A ClassVar without an explicit type annotation now causes the type of the variable
to be inferred from the initializer:
This feature was contributed by Ivan Levkivskyi (PR 19573).
Disjoint Base Classes (@disjoint_base, PEP 800)
Mypy now understands disjoint bases (PEP 800): it recognizes the
@disjoint_basedecorator, and rejects class definitions that combine mutually incompatible base classes,
and takes advantage of the fact that such classes cannot exist in reachability and
narrowing logic.
This class definition will now generate an error:
v1.17.1Compare Source
Noneas constraints bottom if no bottoms were provided (Stanislav Terliakov, PR 19485)hasattr" in dmypy (Stanislav Terliakov, PR 19428)v1.17.0Compare Source
v1.16.1Compare Source
v1.16.0Compare Source
v1.15.0Compare Source
v1.14.1Compare Source
v1.14.0Compare Source
v1.13.0Compare Source
v1.12.1Compare Source
os.pathstubs affecting use ofos.PathLike[Any](Shantanu, PR 17995)v1.12.0Compare Source
v1.11.2Compare Source
TypedDictitem types before storing (Ivan Levkivskyi, PR 17640)v1.11.1Compare Source
RawExpressionType.acceptcrash with--cache-fine-grained(Anders Kaseorg, PR 17588)typing.TypeAliasTypebeing undefined on python < 3.12 (Nikita Sobolev, PR 17558)types.GenericAliaslookup crash (Shantanu, PR 17543)v1.11.0Compare Source
v1.10.1Compare Source
v1.10.0Compare Source
v1.9.0Compare Source
v1.8.0Compare Source
v1.7.1Compare Source
v1.7.0Compare Source
v1.6.1Compare Source
v1.6.0Compare Source
v1.5.1Compare Source
v1.5.0Compare Source
v1.4.1Compare Source
v1.4.0Compare Source
v1.3.0Compare Source
v1.2.0Compare Source
v1.1.1Compare Source
Monday, 6 March 2023
We’ve just uploaded mypy 1.1.1 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:
You can read the full documentation for this release on Read the Docs.
Support for `dataclass_transform``
This release adds full support for the dataclass_transform decorator defined in PEP 681. This allows decorators, base classes, and metaclasses that generate a __init__ method or other methods based on the properties of that class (similar to dataclasses) to have those methods recognized by mypy.
This was contributed by Wesley Collin Wright.
Dedicated Error Code for Method Assignments
Mypy can’t safely check all assignments to methods (a form of monkey patching), so mypy generates an error by default. To make it easier to ignore this error, mypy now uses the new error code method-assign for this. By disabling this error code in a file or globally, mypy will no longer complain about assignments to methods if the signatures are compatible.
Mypy also supports the old error code assignment for these assignments to prevent a backward compatibility break. More generally, we can use this mechanism in the future if we wish to split or rename another existing error code without causing backward compatibility issues.
This was contributed by Ivan Levkivskyi (PR 14570).
Fixes to Crashes
Fixes to Cache Corruption
Mypyc Fixes and Improvements
Fixes to Detecting Undefined Names (used-before-def)
Stubgen Improvements
Stubgen is a tool for automatically generating draft stubs for libraries.
Stubtest Improvements
Stubtest is a tool for testing that stubs conform to the implementations.
Changes to Error Reporting and Messages
typing_extensionsif definition is not in typing (Shantanu, PR 14591)Other Fixes and Improvements
Typeshed Updates
Typeshed is now modular and distributed as separate PyPI packages for everything except the standard library stubs. Please see git log for full list of typeshed changes.
Acknowledgements
Thanks to all mypy contributors who contributed to this release:
We’d also like to thank our employer, Dropbox, for funding the mypy core team.
Posted by Max Murin
v1.0.1Compare Source
v1.0.0Compare Source
v0.991Compare Source
v0.990Compare Source
v0.982Compare Source
v0.981Compare Source
Configuration
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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
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