--strict-equality for None
#19718
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--strict-equality for None
#19718
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I'm curious to see what the Mypy primer thinks of it...
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Diff from mypy_primer, showing the effect of this PR on open source code: aiohttp (https://github.com/aio-libs/aiohttp)
+ aiohttp/client_reqrep.py:147:48: error: Non-overlapping identity check (left operand type: "URL", right operand type: "type[_SENTINEL]") [comparison-overlap]
+ aiohttp/client_reqrep.py:147:48: note: See https://mypy.rtfd.io/en/stable/_refs.html#code-comparison-overlap for more info
pandas (https://github.com/pandas-dev/pandas)
+ pandas/core/arrays/datetimes.py:2958: error: Non-overlapping identity check (left operand type: "Timestamp", right operand type: "NaTType") [comparison-overlap]
+ pandas/core/arrays/datetimes.py:2966: error: Non-overlapping identity check (left operand type: "Timestamp", right operand type: "NaTType") [comparison-overlap]
+ pandas/core/arrays/arrow/array.py:703: error: Non-overlapping identity check (left operand type: "int | integer[Any] | slice[Any, Any, Any] | list[int]", right operand type: "EllipsisType") [comparison-overlap]
+ pandas/core/arrays/sparse/array.py:972: error: Non-overlapping identity check (left operand type: "int | integer[Any] | slice[Any, Any, Any] | list[int] | ndarray[tuple[Any, ...], dtype[Any]] | tuple[int | ellipsis, ...]", right operand type: "ellipsis") [comparison-overlap]
+ pandas/io/json/_json.py:1209: error: Non-overlapping identity check (left operand type: "ExtensionDtype | str | dtype[Any] | type[object] | Mapping[Hashable, ExtensionDtype | str | dtype[Any] | type[str] | type[complex] | type[bool] | type[object]]", right operand type: "Literal[True]") [comparison-overlap]
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Fixes #18386
I'm curious to see what the Mypy primer thinks of it...