Fixed false negative when a keyword parameter in a child class method…#10866
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Fixed false negative when a keyword parameter in a child class method…#10866
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… overrides a method with a `**kwargs` in the parent and the type is incompatible. This addresses #10815.
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Diff from mypy_primer, showing the effect of this PR on open source code: sympy (https://github.com/sympy/sympy)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:619:16 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:619:19 - error: Argument of type "Expr | Unknown | float" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
+ Type "Expr | Unknown | float" is not assignable to type "Expr"
+ "float" is not assignable to "Expr" (reportArgumentType)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:624:16 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:624:19 - error: Argument of type "Expr | Unknown | float" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
+ Type "Expr | Unknown | float" is not assignable to type "Expr"
+ "float" is not assignable to "Expr" (reportArgumentType)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:2093:23 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:2093:26 - error: Argument of type "Expr | Unknown | float" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
+ Type "Expr | Unknown | float" is not assignable to type "Expr"
+ "float" is not assignable to "Expr" (reportArgumentType)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:2108:60 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/tests/test_solveset.py:2108:63 - error: Argument of type "Expr | Unknown | float" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
+ Type "Expr | Unknown | float" is not assignable to type "Expr"
+ "float" is not assignable to "Expr" (reportArgumentType)
- Return type mismatch: base method returns type "None", override returns type "ComplexInfinity | NaN | Rational | Unknown"
+ Return type mismatch: base method returns type "None", override returns type "ComplexInfinity | NaN | Rational | Unknown | Zero | Expr"
- Type "ComplexInfinity | NaN | Rational | Unknown" is not assignable to type "None"
+ Type "ComplexInfinity | NaN | Rational | Unknown | Zero | Expr" is not assignable to type "None"
- "ComplexInfinity" is not assignable to "None" (reportIncompatibleMethodOverride)
+ "Expr" is not assignable to "None" (reportIncompatibleMethodOverride)
- Return type mismatch: base method returns type "None", override returns type "Expr | NaN | ComplexInfinity | Rational | Unknown"
+ Return type mismatch: base method returns type "None", override returns type "Expr | NaN | ComplexInfinity | Rational | Unknown | One | NegativeOne | Zero | Integer"
- Type "Expr | NaN | ComplexInfinity | Rational | Unknown" is not assignable to type "None"
+ Type "Expr | NaN | ComplexInfinity | Rational | Unknown | One | NegativeOne | Zero | Integer" is not assignable to type "None"
- .../projects/sympy/sympy/stats/drv.py:268:22 - error: Argument of type "Generator[tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | int | None, None, None]" cannot be assigned to parameter "iterable" of type "Iterable[_SupportsSumNoDefaultT@sum]" in function "sum"
+ .../projects/sympy/sympy/stats/drv.py:268:22 - error: Argument of type "Generator[tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | int | None, None, None]" cannot be assigned to parameter "iterable" of type "Iterable[_SupportsSumNoDefaultT@sum]" in function "sum"
- "Generator[tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | int | None, None, None]" is not assignable to "Iterable[_SupportsSumNoDefaultT@sum]"
+ "Generator[tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | int | None, None, None]" is not assignable to "Iterable[_SupportsSumNoDefaultT@sum]"
- Type parameter "_T_co@Iterable" is covariant, but "tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | int | None" is not a subtype of "_SupportsSumNoDefaultT@sum"
+ Type parameter "_T_co@Iterable" is covariant, but "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | int | None" is not a subtype of "_SupportsSumNoDefaultT@sum"
- Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
+ Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
- Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
+ Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
- .../projects/sympy/sympy/stats/drv_types.py:292:16 - error: Operator "*" not supported for types "Expr" and "tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | None"
+ .../projects/sympy/sympy/stats/drv_types.py:292:16 - error: Operator "*" not supported for types "Expr" and "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | None"
- .../projects/sympy/sympy/stats/random_matrix_models.py:110:36 - error: Operator "*" not supported for types "Expr" and "tuple[Unknown, ...] | Unknown | Product | Basic | Expr | One | BooleanFalse | BooleanTrue | Equality | NaN"
+ .../projects/sympy/sympy/stats/random_matrix_models.py:110:36 - error: Operator "*" not supported for types "Expr" and "tuple[Unknown, ...] | Unknown | Product | Basic | BooleanFalse | BooleanTrue | ComplexInfinity | Equality | Expr | Float | Infinity | Integer | NaN | NegativeInfinity | NegativeOne | Number | One | Rational | Zero"
- .../projects/sympy/sympy/stats/rv.py:473:25 - error: Argument of type "Expr | Lambda | Zero | One | Integral | Unknown | Probability | tuple[Unknown, ...] | Sum | NaN | Piecewise | Basic | NegativeOne | Integer | ComplexInfinity | Rational | Infinity | NegativeInfinity | Float | Number | int" cannot be assigned to parameter "args" of type "Expr | complex" in function "__new__"
+ .../projects/sympy/sympy/stats/rv.py:473:25 - error: Argument of type "Expr | Lambda | Zero | One | Integral | Unknown | Probability | tuple[Unknown, ...] | Sum | Any | NaN | Piecewise | Basic | NegativeOne | Integer | ComplexInfinity | Rational | Infinity | NegativeInfinity | Float | Number | int" cannot be assigned to parameter "args" of type "Expr | complex" in function "__new__"
- Type "Expr | Lambda | Zero | One | Integral | Unknown | Probability | tuple[Unknown, ...] | Sum | NaN | Piecewise | Basic | NegativeOne | Integer | ComplexInfinity | Rational | Infinity | NegativeInfinity | Float | Number | int" is not assignable to type "Expr | complex"
+ Type "Expr | Lambda | Zero | One | Integral | Unknown | Probability | tuple[Unknown, ...] | Sum | Any | NaN | Piecewise | Basic | NegativeOne | Integer | ComplexInfinity | Rational | Infinity | NegativeInfinity | Float | Number | int" is not assignable to type "Expr | complex"
- .../projects/sympy/sympy/stats/stochastic_process_types.py:1839:25 - error: Argument of type "tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | Integral | Any | int | None" cannot be assigned to parameter "args" of type "Expr | complex" in function "__new__"
+ .../projects/sympy/sympy/stats/stochastic_process_types.py:1839:25 - error: Argument of type "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | Integral | int | None" cannot be assigned to parameter "args" of type "Expr | complex" in function "__new__"
- Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Zero | NaN | Piecewise | Basic | Integral | Any | int | None" is not assignable to type "Expr | complex"
+ Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Zero | NaN | Piecewise | Basic | Integral | int | None" is not assignable to type "Expr | complex"
- Return type mismatch: base method returns type "Self@Basic", override returns type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | Self@Expectation | Literal[0] | None"
+ Return type mismatch: base method returns type "Self@Basic", override returns type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Zero | NaN | Piecewise | Integral | Self@Expectation | Literal[0] | None"
- Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | Expectation* | Literal[0] | None" is not assignable to type "Basic"
+ Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Zero | NaN | Piecewise | Integral | Expectation* | Literal[0] | None" is not assignable to type "Basic"
- Return type mismatch: base method returns type "Basic", override returns type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | Literal[0] | None"
+ Return type mismatch: base method returns type "Basic", override returns type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Zero | NaN | Piecewise | Integral | Literal[0] | None"
- Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | Literal[0] | None" is not assignable to type "Basic"
... (truncated 93 lines) ...
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erictraut
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Sep 1, 2025
* main: Changed the evaluated type of `__class__` from `type[Self]` to `type[<Enclosing class]`. This addresses #10685. (#10874) Added optimization that reduces the number of Uri objects that need to be created during type evaluation. This is an attempt to address #10832. (#10872) Fixed bug that causes a false negative when using unquoted types in a TypedDict functional class definition if the types are forward declared. This addresses #10612. (#10869) Fixed bug that resulted in false negative when backslash followed by line feed occurs at end of file. This addresses #10814. (#10867) Fixed false negative when a keyword parameter in a child class method overrides a method with a `**kwargs` in the parent and the type is incompatible. This addresses #10815. (#10866) Fixed regression introduced in 1.1.343 that results in nondeterministic (order-dependent) type evaluation under certain circumstances involving recursive type aliases. This addresses #10850. (#10865) Revert "Added support for tracking multiple constraint sets when performing protocol matching. This allows protocols with overloaded methods to contribute independent constraint sets. This addresses #9835. (#9864)" (#10863) Fixed bug that contributes to out-of-memory crashes under certain circumstances where a module's transitive import graph is very large and may not fit within the available heap space. (#10862) Bump tmp from 0.2.3 to 0.2.5 in /packages/vscode-pyright (#10824) Added support for `match_args` dataclass parameter. This addresses #10858. (#10861) Fixed bug that results in false negative when a `closed=False` is used in `TypedDict` that subclasses from a non-open `TypedDict` base class. This addresses #10859. (#10860) Revert "Reverted a recent change that appears to have affected performance on some projects. This attempts to address #10832. (#10841)" Improved performance of import resolution when there are large number… (#10855) Document editable installs with uv (#10854) Fixed a bug that results in spurious errors if a class decorator is a… (#10846) Fixed a bug that results in false positive errors when using `object` methods (like `__eq__`) on a `Sentinel` instance. This addresses #10773. (#10844) Fixed bug that results in incorrect literal math results for bitwise negation. This addresses #10834. (#10842) Reverted a recent change that appears to have affected performance on some projects. This attempts to address #10832. (#10841) pull-pylance-with-pyright-1.1.403-20250820-201137 (#10831)
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… overrides a method with a
**kwargsin the parent and the type is incompatible. This addresses #10815.