2.9.0

based on mypy 1.14.0

Added

• collections.User* should have __repr__

Fixes

• cache modules that only have baseline errors

v2.8.1

based on mypy 1.13.0

Fixes

• stubtest: the __bool__ method of function parameter defaults will no longer be unnecessarily evaluated. Contribution by @jorenham

2.8.0

based on mypy 1.13.0

Added

• ban variance on TypeVar definitions (#817)
• enforce TypeVar constraints on type applications (#817)

Fixes

• check type args on type aliases (#817)
• cache modules that only have baseline errors
• fix dmypy in vscode

Docs

• correct error code documentation regarding defaults

2.7.0

based on mypy 1.13.0

Added

• typed functools.wraps correctly
• typed builtins.ellipsis/types.EllipsisType correctly
• disable bytearray and memoryview promotions by default
• support typing.type_check_only
• support default values on type parameters
• support based type notation in type alias statements
• support basedtyping.FunctionType

Fixes

• fixed crash with re plugin
• fixed crash with Intersection cache
• fixed definition of types.NoneType

Enhancements

• fixed default configuration in the docs

2.6.0

based on mypy 1.11.1

Added

• Any parameter _ will be inferred as object (#687)
• work_not_properly_function_names made available to per module configuration (#699)
• Support BASEDMYPY_TYPE_CHECKING (#702)
• Enable stub mode within TYPE_CHECKING branches (#702)
• Infer from overloads - add default value in impl (#697)
• Warn for missing returns with explicit Any return types (#715)

Fixes

• positional arguments on overloads break super (#697)
• positional arguments on overloads duplicate unions (#697)
• fix intersection type aliases (#716)

2.5.0

based on mypy 1.10

Added

• Callable syntax ((int) -> str) (#619)
• FunctionType syntax (def (int) -> str) (#619)

Fixes

• Callable is no longer types.FunctionType (#619)

2.4.0

Based on mypy 1.8.0

2.3.0

Based on mypy 1.7.1

Added

• f-string format specs are checked (#543)
• Narrow type on initial assignment (#547)
• Annotations in function bodies are not analyzed as evaluated (#564)
• Invalid casts show an error (#573)
• Argument names are validated for subtypes (#562)
• Type-guards narrow in the negative (#553)
• Conditional types for asymmetric type-guards (#553)
• Static conditions report an error (#553)
• Regex groups are special-cased (#531)
• f-strings will show an error if the value doesn't define a stringification (#565)

Enhancements

• Show 'narrowed from' in reveal_type (#550)
• --color-output is enabled by default (#531)
• --ide will disable color-output (#531)
• Output lines won't wrap if not connected to a terminal (#531)

Fixes

• Render star args in error messages properly (#551)
• The first argument to cast is analyzed as evaluated (#564)
• Decorated functions that return None correctly warn when used (#572)
• Some impossible type-guards were not reporting an error (#553)

2.2.1

Fixes a regression with the default config regarding explicit-override

2.2.0

Based on mypy 1.6.0

Our agile development teams have been extremely effective with the use of burndown charts. They've already burnt down two floors of our new office 😊.

Added

• type-guards have been reworked from the ground up (#516)
• TypeGuard is retained in inferred types (#504)
• Type narrowing is applied from lambda execution (#504)
• --ide flag (#501)

Enhancements

• show-error-context/pretty are now on by default (#501)
• Show fake column number when --show-error-end (#501)
• Error messages point to basedmypy docs (#516)
• Callable types in error messages don't contain mypy_extensions (#516)

Fixes

• Don't show "X defined here" when error context is hidden (#498)
• Fix issue with reveal code in ignore message (#490)
• Fixed union at join for same type literals. (#488)
• Don't report false Any expressions when inferring lambda type (#515)
• Correctly match overload when it contains an Any expression (#515)
• Fixed the variance of Mappings key type (#527)