Experiment: What happens when we only convert mutablemapping.pop keys to object?

[randolf-scholz]

#15297 (comment)

[github-actions]

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

bidict (https://github.com/jab/bidict)
+ bidict/_bidict.py: note: In member "pop" of class "MutableBidict":+ bidict/_bidict.py:122:6: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ bidict/_bidict.py:122:6: note: Superclass:+ bidict/_bidict.py:122:6: note: @overload+ bidict/_bidict.py:122:6: note: def pop(self, object, /) -> VT+ bidict/_bidict.py:122:6: note: @overload+ bidict/_bidict.py:122:6: note: def pop(self, object, VT, /) -> VT+ bidict/_bidict.py:122:6: note: @overload+ bidict/_bidict.py:122:6: note: def [_T] pop(self, object, _T, /) -> VT | _T+ bidict/_bidict.py:122:6: note: Subclass:+ bidict/_bidict.py:122:6: note: @overload+ bidict/_bidict.py:122:6: note: def pop(self, KT, /) -> VT+ bidict/_bidict.py:122:6: note: @overload+ bidict/_bidict.py:122:6: note: def [DT] pop(self, KT, DT = ..., /) -> VT | DT
mongo-python-driver (https://github.com/mongodb/mongo-python-driver)
+ bson/son.py:126: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ bson/son.py:126: note: Superclass:+ bson/son.py:126: note: @overload+ bson/son.py:126: note: def pop(self, object, /) -> _Value+ bson/son.py:126: note: @overload+ bson/son.py:126: note: def pop(self, object, _Value, /) -> _Value+ bson/son.py:126: note: @overload+ bson/son.py:126: note: def [_T] pop(self, object, _T, /) -> _Value | _T+ bson/son.py:126: note: Subclass:+ bson/son.py:126: note: def [_T] pop(self, key: _Key, *args: _Value | _T) -> _Value | _T+ pymongo/common.py:1045: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ pymongo/common.py:1045: note: Superclass:+ pymongo/common.py:1045: note: @overload+ pymongo/common.py:1045: note: def pop(self, object, /) -> Any+ pymongo/common.py:1045: note: @overload+ pymongo/common.py:1045: note: def pop(self, object, Any, /) -> Any+ pymongo/common.py:1045: note: @overload+ pymongo/common.py:1045: note: def [_T] pop(self, object, _T, /) -> Any | _T+ pymongo/common.py:1045: note: Subclass:+ pymongo/common.py:1045: note: def pop(self, key: str, *args: Any, **kwargs: Any) -> Any
pyodide (https://github.com/pyodide/pyodide)
+ src/py/_pyodide/_core_docs.py:1151: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ src/py/_pyodide/_core_docs.py:1151: note: Superclass:+ src/py/_pyodide/_core_docs.py:1151: note: @overload+ src/py/_pyodide/_core_docs.py:1151: note: def pop(self, object, /) -> VT+ src/py/_pyodide/_core_docs.py:1151: note: @overload+ src/py/_pyodide/_core_docs.py:1151: note: def pop(self, object, VT, /) -> VT+ src/py/_pyodide/_core_docs.py:1151: note: @overload+ src/py/_pyodide/_core_docs.py:1151: note: def [_T] pop(self, object, _T, /) -> VT | _T+ src/py/_pyodide/_core_docs.py:1151: note: Subclass:+ src/py/_pyodide/_core_docs.py:1151: note: @overload+ src/py/_pyodide/_core_docs.py:1151: note: def pop(self, KT, /) -> VT+ src/py/_pyodide/_core_docs.py:1151: note: @overload+ src/py/_pyodide/_core_docs.py:1151: note: def [T] pop(self, KT, VT | T = ..., /) -> VT | T
django-stubs (https://github.com/typeddjango/django-stubs)
+ django-stubs/http/request.pyi:202: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ django-stubs/http/request.pyi:202: note: Superclass:+ django-stubs/http/request.pyi:202: note: @overload+ django-stubs/http/request.pyi:202: note: def pop(self, object, /) -> str+ django-stubs/http/request.pyi:202: note: @overload+ django-stubs/http/request.pyi:202: note: def pop(self, object, str, /) -> str+ django-stubs/http/request.pyi:202: note: @overload+ django-stubs/http/request.pyi:202: note: def [_T] pop(self, object, _T, /) -> str | _T+ django-stubs/http/request.pyi:202: note: Subclass:+ django-stubs/http/request.pyi:202: note: @overload+ django-stubs/http/request.pyi:202: note: def pop(self, str | bytes, /) -> Never+ django-stubs/http/request.pyi:202: note: @overload+ django-stubs/http/request.pyi:202: note: def [_Z] pop(self, str | bytes, str | _Z = ..., /) -> Never
scrapy (https://github.com/scrapy/scrapy)
+ scrapy/utils/datatypes.py:98: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ scrapy/utils/datatypes.py:98: note: Superclass:+ scrapy/utils/datatypes.py:98: note: @overload+ scrapy/utils/datatypes.py:98: note: def pop(self, object, /) -> Any+ scrapy/utils/datatypes.py:98: note: @overload+ scrapy/utils/datatypes.py:98: note: def pop(self, object, Any, /) -> Any+ scrapy/utils/datatypes.py:98: note: @overload+ scrapy/utils/datatypes.py:98: note: def [_T] pop(self, object, _T, /) -> Any | _T+ scrapy/utils/datatypes.py:98: note: Subclass:+ scrapy/utils/datatypes.py:98: note: def [AnyStr: (str, bytes)] pop(self, key: AnyStr, *args: Any) -> Any+ scrapy/settings/__init__.py:629: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ scrapy/settings/__init__.py:629: note: Superclass:+ scrapy/settings/__init__.py:629: note: @overload+ scrapy/settings/__init__.py:629: note: def pop(self, object, /) -> Any+ scrapy/settings/__init__.py:629: note: @overload+ scrapy/settings/__init__.py:629: note: def pop(self, object, Any, /) -> Any+ scrapy/settings/__init__.py:629: note: @overload+ scrapy/settings/__init__.py:629: note: def [_T] pop(self, object, _T, /) -> Any | _T+ scrapy/settings/__init__.py:629: note: Subclass:+ scrapy/settings/__init__.py:629: note: def pop(self, name: bool | float | int | str | None, default: Any = ...) -> Any
steam.py (https://github.com/Gobot1234/steam.py)
+ steam/utils.py:559: error: Signature of "pop" incompatible with supertype "typing.MutableMapping" [override]+ steam/utils.py:559: note: Superclass:+ steam/utils.py:559: note: @overload+ steam/utils.py:559: note: def pop(self, object, /) -> _VT+ steam/utils.py:559: note: @overload+ steam/utils.py:559: note: def pop(self, object, _VT, /) -> _VT+ steam/utils.py:559: note: @overload+ steam/utils.py:559: note: def [_T] pop(self, object, _T, /) -> _VT | _T+ steam/utils.py:559: note: Subclass:+ steam/utils.py:559: note: @overload+ steam/utils.py:559: note: def pop(self, key: _KT) -> _VT+ steam/utils.py:559: note: @overload+ steam/utils.py:559: note: def [_T] pop(self, key: _KT, default: _VT | _T) -> _VT | _T- steam/ext/commands/utils.py:52: note: def pop(self, str, /) -> _VT+ steam/ext/commands/utils.py:52: note: def pop(self, object, /) -> _VT- steam/ext/commands/utils.py:52: note: def pop(self, str, _VT, /) -> _VT+ steam/ext/commands/utils.py:52: note: def pop(self, object, _VT, /) -> _VT- steam/ext/commands/utils.py:52: note: def [_T] pop(self, str, _T, /) -> _VT | _T+ steam/ext/commands/utils.py:52: note: def [_T] pop(self, object, _T, /) -> _VT | _T