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Added special-case logic to detect when a class-like symbol created b… #10559

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erictraut
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…y calling NewType is used as an actual class for assignability or member accesses. This addresses #10550.

…y calling NewType is used as an actual class for assignability or member accesses. This addresses #10550.
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github-actions bot commented Jun 8, 2025

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

websockets (https://github.com/aaugustin/websockets)
+   ...:151:26 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+   ...:161:50 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+ ...
+   ...:61:22 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+   ...:71:46 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+   ...:137:22 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+   ...:147:46 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+   ...:234:26 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
+   ...:245:50 - error: Cannot access attribute "lower" for class "FunctionType"
+     Attribute "lower" is unknown (reportFunctionMemberAccess)
- 72 errors, 2 warnings, 0 informations 
+ 80 errors, 2 warnings, 0 informations 

sympy (https://github.com/sympy/sympy)
+   ...:540:50 - error: "Set" is not iterable
+     "__iter__" method not defined (reportGeneralTypeIssues)
-   ...:2542:9 - error: Method "_cdf" overrides class "SingleContinuousDistribution" in an incompatible manner
-     Return type mismatch: base method returns type "None", override returns type "ComplexInfinity | NaN | Rational | Unknown"
-       Type "ComplexInfinity | NaN | Rational | Unknown" is not assignable to type "None"
-         "ComplexInfinity" is not assignable to "None" (reportIncompatibleMethodOverride)
-   ...:2721:9 - error: Method "_cdf" overrides class "SingleContinuousDistribution" in an incompatible manner
-     Return type mismatch: base method returns type "None", override returns type "Expr | NaN | ComplexInfinity | Rational | Unknown"
-       Type "Expr | NaN | ComplexInfinity | Rational | Unknown" is not assignable to type "None"
-         "Expr" is not assignable to "None" (reportIncompatibleMethodOverride)
+   ...:261:48 - error: Cannot access attribute "doit" for class "tuple[Unknown, ...]"
+     Attribute "doit" is unknown (reportAttributeAccessIssue)
+   ...:261:48 - error: "doit" is not a known attribute of "None" (reportOptionalMemberAccess)
-   ...:268:22 - error: Argument of type "Generator[Unknown | int | None, None, None]" cannot be assigned to parameter "iterable" of type "Iterable[_SupportsSumNoDefaultT@sum]" in function "sum"
+   ...:268:22 - error: Argument of type "Generator[tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | int | None, None, None]" cannot be assigned to parameter "iterable" of type "Iterable[_SupportsSumNoDefaultT@sum]" in function "sum"
-     "Generator[Unknown | int | None, None, None]" is not assignable to "Iterable[_SupportsSumNoDefaultT@sum]"
+     "Generator[tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | int | None, None, None]" is not assignable to "Iterable[_SupportsSumNoDefaultT@sum]"
-       Type parameter "_T_co@Iterable" is covariant, but "Unknown | int | None" is not a subtype of "_SupportsSumNoDefaultT@sum"
+       Type parameter "_T_co@Iterable" is covariant, but "tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | int | None" is not a subtype of "_SupportsSumNoDefaultT@sum"
-         Type "Unknown | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
+         Type "tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
-           Type "Unknown | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
+           Type "tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | int | None" is not assignable to type "_SupportsSumWithNoDefaultGiven"
-             "None" is incompatible with protocol "_SupportsSumWithNoDefaultGiven" (reportArgumentType)
+             "Basic" is incompatible with protocol "_SupportsSumWithNoDefaultGiven" (reportArgumentType)
-   ...:138:17 - error: Argument of type "NaN | ComplexInfinity | Rational | Unknown | Expr" cannot be assigned to parameter "value" of type "int" in function "__setitem__"
-     Type "NaN | ComplexInfinity | Rational | Unknown | Expr" is not assignable to type "int"
-       "Expr" is not assignable to "int" (reportArgumentType)
+   ...: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__"
+     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 "Basic" is not assignable to type "Expr | complex"
+         "Basic" is not assignable to "Expr"
+         "Basic" is not assignable to "complex" (reportArgumentType)
+   ...:741:20 - error: "Set" is not iterable
+     "__iter__" method not defined (reportGeneralTypeIssues)
-   ...:1839:25 - error: Argument of type "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Add | Zero | NaN | Piecewise | Basic | Integral | int | None" cannot be assigned to parameter "args" of type "Expr | complex" in function "__new__"
+   ...:1839:25 - error: Argument of type "tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | Integral | Any | int | None" cannot be assigned to parameter "args" of type "Expr | complex" in function "__new__"
-     Type "tuple[Unknown, ...] | Unknown | Sum | Expr | Any | Add | Zero | NaN | Piecewise | Basic | Integral | int | None" is not assignable to type "Expr | complex"
+     Type "tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Basic | Integral | Any | int | None" is not assignable to type "Expr | complex"
+   ...:1894:27 - error: Cannot access attribute "doit" for class "tuple[Unknown, ...]"
+     Attribute "doit" is unknown (reportAttributeAccessIssue)
-     Return type mismatch: base method returns type "Self@Basic", override returns type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | Self@Expectation | Literal[0] | None"
+     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"
-       Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | Expectation* | Literal[0] | None" is not assignable to type "Basic"
+       Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | Expectation* | Literal[0] | None" is not assignable to type "Basic"
-   ...:74:9 - error: Method "doit" overrides class "Basic" in an incompatible manner
-     Return type mismatch: base method returns type "Basic", override returns type "Unknown | Any | BernoulliDistribution | Probability | Zero | One | ComplexInfinity | Expr | Float | Infinity | Integer | Lambda | NaN | NegativeInfinity | NegativeOne | Number | Piecewise | Rational | Integral | Literal[0]"
-       Type "Unknown | Any | BernoulliDistribution | Probability | Zero | One | ComplexInfinity | Expr | Float | Infinity | Integer | Lambda | NaN | NegativeInfinity | NegativeOne | Number | Piecewise | Rational | Integral | Literal[0]" is not assignable to type "Basic"
-         "Literal[0]" is not assignable to "Basic" (reportIncompatibleMethodOverride)
+   ...:123:27 - error: Cannot access attribute "doit" for class "tuple[Unknown, ...]"
+     Attribute "doit" is unknown (reportAttributeAccessIssue)
-     Return type mismatch: base method returns type "Basic", override returns type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | Literal[0] | None"
+     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"
-       Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | Literal[0] | None" is not assignable to type "Basic"
+       Type "Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | Literal[0] | None" is not assignable to type "Basic"
+   ...:41:21 - error: Cannot access attribute "simplify" for class "tuple[Unknown, ...]"
+     Attribute "simplify" is unknown (reportAttributeAccessIssue)
+   ...:41:21 - error: "simplify" is not a known attribute of "None" (reportOptionalMemberAccess)
-   ...:366:12 - error: Operator "-" not supported for types "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | ExpectationMatrix | Literal[0] | None" and "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | ExpectationMatrix | Literal[0] | None"
+   ...:366:12 - error: Operator "-" not supported for types "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | ExpectationMatrix | Literal[0] | None" and "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | ExpectationMatrix | Literal[0] | None"
-   ...:414:21 - error: Argument of type "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | ExpectationMatrix | Literal[0] | None" cannot be assigned to parameter "expr" of type "Basic" in function "simplify"
+   ...:414:21 - error: Argument of type "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | ExpectationMatrix | Literal[0] | None" cannot be assigned to parameter "expr" of type "Basic" in function "simplify"
-     Type "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Any | Add | Zero | NaN | Piecewise | Integral | ExpectationMatrix | Literal[0] | None" is not assignable to type "Basic"
+     Type "RandomSymbol | Basic | Expectation | Expr | tuple[Unknown, ...] | Unknown | Sum | Zero | NaN | Piecewise | Integral | Any | ExpectationMatrix | Literal[0] | None" is not assignable to type "Basic"

... (truncated 1921 lines) ...

pyodide (https://github.com/pyodide/pyodide)
+ ...
+   ...:90:27 - error: Cannot access attribute "replace" for class "FunctionType"
+     Attribute "replace" is unknown (reportFunctionMemberAccess)
+   ...:542:26 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
+   ...:121:37 - error: Cannot access attribute "replace" for class "FunctionType"
+     Attribute "replace" is unknown (reportFunctionMemberAccess)
- 815 errors, 15 warnings, 0 informations 
+ 818 errors, 15 warnings, 0 informations 

bokeh (https://github.com/bokeh/bokeh)
+ ...
+   ...:180:64 - error: Cannot access attribute "replace" for class "FunctionType"
+     Attribute "replace" is unknown (reportFunctionMemberAccess)
+   ...:295:61 - error: Cannot access attribute "replace" for class "FunctionType"
+     Attribute "replace" is unknown (reportFunctionMemberAccess)
- 1051 errors, 51 warnings, 0 informations 
+ 1053 errors, 51 warnings, 0 informations 

strawberry (https://github.com/strawberry-graphql/strawberry)
+   ...:153:49 - error: Variable not allowed in type expression (reportInvalidTypeForm)
+   ...:154:15 - error: Variable not allowed in type expression (reportInvalidTypeForm)
-   ...:158:40 - error: Cannot access attribute "pop" for class "_Any"
-     Attribute "pop" is unknown (reportAttributeAccessIssue)
-   ...:171:21 - error: "__setitem__" method not defined on type "_Any" (reportIndexIssue)
-   ...:174:50 - error: Argument expression after ** must be a mapping with a "str" key type (reportCallIssue)
+ ...
+   ...:5:17 - error: Argument of type "type[Upload]" cannot be assigned to parameter "cls" of type "_T@scalar" in function "scalar"
+     Type "FunctionType" is not assignable to type "type"
+       "FunctionType" is not assignable to "type" (reportArgumentType)
+   ...:18:5 - error: Argument of type "type[JSON]" cannot be assigned to parameter "cls" of type "_T@scalar" in function "scalar"
+     Type "FunctionType" is not assignable to type "type"
+       "FunctionType" is not assignable to "type" (reportArgumentType)
+   ...:32:5 - error: Argument of type "type[Base16]" cannot be assigned to parameter "cls" of type "_T@scalar" in function "scalar"
+     Type "FunctionType" is not assignable to type "type"
+       "FunctionType" is not assignable to "type" (reportArgumentType)
+   ...:40:5 - error: Argument of type "type[Base32]" cannot be assigned to parameter "cls" of type "_T@scalar" in function "scalar"
+     Type "FunctionType" is not assignable to type "type"
+       "FunctionType" is not assignable to "type" (reportArgumentType)
+   ...:50:5 - error: Argument of type "type[Base64]" cannot be assigned to parameter "cls" of type "_T@scalar" in function "scalar"
+     Type "FunctionType" is not assignable to type "type"
+       "FunctionType" is not assignable to "type" (reportArgumentType)
+ ...
+   ...:808:37 - error: Argument of type "type[ID]" cannot be assigned to parameter "scalar" of type "type" in function "from_scalar"
+     "FunctionType" is not assignable to "type" (reportArgumentType)
- 378 errors, 69 warnings, 0 informations 
+ 383 errors, 69 warnings, 0 informations 

pydantic (https://github.com/pydantic/pydantic)
+   ...:2189:25 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
+   ...:2370:38 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
+ ...
- 11 errors, 0 warnings, 0 informations 
+ 13 errors, 0 warnings, 0 informations 

hydpy (https://github.com/hydpy-dev/hydpy)
+   ...:1564:57 - error: Cannot access attribute "split" for class "FunctionType"
+     Attribute "split" is unknown (reportFunctionMemberAccess)
- 1388 errors, 71 warnings, 0 informations 
+ 1389 errors, 71 warnings, 0 informations 

scikit-build-core (https://github.com/scikit-build/scikit-build-core)
+ ...
+   ...:124:42 - error: Cannot access attribute "replace" for class "FunctionType"
+     Attribute "replace" is unknown (reportFunctionMemberAccess)
- 21 errors, 22 warnings, 0 informations 
+ 22 errors, 22 warnings, 0 informations 

core (https://github.com/home-assistant/core)
+   ...:251:46 - error: Cannot access attribute "match" for class "FunctionType"
+     Attribute "match" is unknown (reportFunctionMemberAccess)
+   ...:266:29 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
+   ...:269:31 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
- 69780 errors, 298 warnings, 0 informations 
+ 69783 errors, 298 warnings, 0 informations 

pip (https://github.com/pypa/pip)
+ ...
+   ...:59:40 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
+   ...:463:21 - error: Cannot access attribute "endswith" for class "FunctionType"
+     Attribute "endswith" is unknown (reportFunctionMemberAccess)
+   ...:521:21 - error: Cannot access attribute "split" for class "FunctionType"
+     Attribute "split" is unknown (reportFunctionMemberAccess)
+   ...:531:22 - error: Cannot access attribute "split" for class "FunctionType"
+     Attribute "split" is unknown (reportFunctionMemberAccess)
+ ...
+   ...:59:26 - error: Cannot access attribute "startswith" for class "FunctionType"
+     Attribute "startswith" is unknown (reportFunctionMemberAccess)
- 1627 errors, 24 warnings, 0 informations 
+ 1632 errors, 24 warnings, 0 informations 

hydra-zen (https://github.com/mit-ll-responsible-ai/hydra-zen)
+ ...
+   ...:172:23 - error: Cannot access attribute "count" for class "FunctionType"
+     Attribute "count" is unknown (reportFunctionMemberAccess)
+   ...:173:30 - error: Cannot access attribute "replace" for class "FunctionType"
+     Attribute "replace" is unknown (reportFunctionMemberAccess)
- 10 errors, 0 warnings, 183 informations 
+ 12 errors, 0 warnings, 183 informations 

spark (https://github.com/apache/spark)
-   ...:181:60 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:181:60 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:207:58 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:207:58 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:237:58 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:237:58 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:246:58 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:246:58 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:260:84 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:260:84 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:275:30 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:275:30 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:399:62 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:399:62 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:535:35 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:535:35 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:545:35 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:545:35 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:556:32 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:556:32 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:571:26 - error: Cannot access attribute "func" for class "GroupedMapPandasUserDefinedFunction"
+   ...:571:26 - error: Cannot access attribute "func" for class "FunctionType"
-     Attribute "func" is unknown (reportAttributeAccessIssue)
+     Attribute "func" is unknown (reportFunctionMemberAccess)
-   ...:67:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:67:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:68:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:68:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:73:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:73:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:74:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:74:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:86:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:86:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:87:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:87:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:90:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:90:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:91:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:91:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:94:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:94:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:95:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:95:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:98:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:98:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:99:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:99:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:102:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:102:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:103:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:103:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:108:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:108:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:109:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:109:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:132:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:132:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:133:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:133:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)
-   ...:139:30 - error: Cannot access attribute "returnType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:139:30 - error: Cannot access attribute "returnType" for class "FunctionType"
-     Attribute "returnType" is unknown (reportAttributeAccessIssue)
+     Attribute "returnType" is unknown (reportFunctionMemberAccess)
-   ...:140:30 - error: Cannot access attribute "evalType" for class "GroupedMapPandasUserDefinedFunction"
+   ...:140:30 - error: Cannot access attribute "evalType" for class "FunctionType"
-     Attribute "evalType" is unknown (reportAttributeAccessIssue)
+     Attribute "evalType" is unknown (reportFunctionMemberAccess)

... (truncated 16 lines) ...

mypy (https://github.com/python/mypy)
+   ...:948:33 - error: Cannot access attribute "copy_modified" for class "FunctionType"
+     Attribute "copy_modified" is unknown (reportFunctionMemberAccess)
+   ...:948:84 - error: Cannot access attribute "arg_types" for class "FunctionType"
+     Attribute "arg_types" is unknown (reportFunctionMemberAccess)
+   ...:952:21 - error: Argument of type "CallableType | NormalizedCallableType | None" cannot be assigned to parameter "left" of type "CallableType" in function "is_callable_compatible"
+     Type "CallableType | NormalizedCallableType | None" is not assignable to type "CallableType"
+       "None" is not assignable to "CallableType" (reportArgumentType)
+   ...:958:52 - error: "ret_type" is not a known attribute of "None" (reportOptionalMemberAccess)
+   ...:958:52 - error: Cannot access attribute "ret_type" for class "FunctionType"
+     Attribute "ret_type" is unknown (reportFunctionMemberAccess)
+   ...:959:40 - error: "ret_type" is not a known attribute of "None" (reportOptionalMemberAccess)
+   ...:959:40 - error: Cannot access attribute "ret_type" for class "FunctionType"
+     Attribute "ret_type" is unknown (reportFunctionMemberAccess)
+   ...:1668:48 - error: Cannot access attribute "with_normalized_var_args" for class "FunctionType"
+     Attribute "with_normalized_var_args" is unknown (reportFunctionMemberAccess)
+   ...:1084:52 - error: Cannot access attribute "with_normalized_var_args" for class "FunctionType"
+     Attribute "with_normalized_var_args" is unknown (reportFunctionMemberAccess)
+   ...:1088:58 - error: Cannot access attribute "with_normalized_var_args" for class "FunctionType"
+     Attribute "with_normalized_var_args" is unknown (reportFunctionMemberAccess)
+   ...:1150:66 - error: Argument of type "CallableType" cannot be assigned to parameter "template" of type "NormalizedCallableType | Parameters" in function "infer_callable_arguments_constraints"
+     Type "CallableType" is not assignable to type "NormalizedCallableType | Parameters"
+       "CallableType" is not assignable to "NormalizedCallableType"
+       "CallableType" is not assignable to "Parameters" (reportArgumentType)
+   ...:1632:22 - error: Cannot access attribute "var_arg" for class "FunctionType"
+     Attribute "var_arg" is unknown (reportFunctionMemberAccess)
+   ...:1633:23 - error: Cannot access attribute "kw_arg" for class "FunctionType"
+     Attribute "kw_arg" is unknown (reportFunctionMemberAccess)
+   ...:1634:24 - error: Cannot access attribute "var_arg" for class "FunctionType"

... (truncated 148 lines) ...```

@erictraut erictraut closed this Jun 8, 2025
@erictraut erictraut deleted the issue-10550 branch June 8, 2025 20:56
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