CLN: remove unneeded mixin classes (#1575)

* remove unneded mixin classes

* clean test

* keep

* fixup

Author: MarcoGorelli

pandas-stubs/api/extensions/__init__.pyi

@@ -4,10 +4,7 @@ from pandas.core.accessor import (
     register_series_accessor as register_series_accessor,
 )
 from pandas.core.algorithms import take as take
-from pandas.core.arrays import (
-    ExtensionArray as ExtensionArray,
-    ExtensionScalarOpsMixin as ExtensionScalarOpsMixin,
-)
+from pandas.core.arrays import ExtensionArray as ExtensionArray
 
 from pandas._libs.lib import no_default as no_default
 

pandas-stubs/core/arrays/__init__.pyi

@@ -1,8 +1,4 @@
-from pandas.core.arrays.base import (
-    ExtensionArray as ExtensionArray,
-    ExtensionOpsMixin as ExtensionOpsMixin,
-    ExtensionScalarOpsMixin as ExtensionScalarOpsMixin,
-)
+from pandas.core.arrays.base import ExtensionArray as ExtensionArray
 from pandas.core.arrays.boolean import BooleanArray as BooleanArray
 from pandas.core.arrays.categorical import Categorical as Categorical
 from pandas.core.arrays.datetimes import DatetimeArray as DatetimeArray

pandas-stubs/core/arrays/base.pyi

@@ -119,13 +119,3 @@ class ExtensionArray:
         skipna: bool = True,
         **kwargs: Any,
     ) -> Self: ...
-
-class ExtensionOpsMixin:
-    @classmethod
-    def _add_arithmetic_ops(cls) -> None: ...
-    @classmethod
-    def _add_comparison_ops(cls) -> None: ...
-    @classmethod
-    def _add_logical_ops(cls) -> None: ...
-
-class ExtensionScalarOpsMixin(ExtensionOpsMixin): ...

pandas-stubs/core/arrays/datetimelike.pyi

@@ -5,10 +5,7 @@ from typing import (
     overload,
 )
 
-from pandas.core.arrays.base import (
-    ExtensionArray,
-    ExtensionOpsMixin,
-)
+from pandas.core.arrays.base import ExtensionArray
 from typing_extensions import Self
 
 from pandas._libs import (
@@ -55,7 +52,7 @@ class TimelikeOps:
         nonexistent: TimeNonexistent = "raise",
     ): ...
 
-class DatetimeLikeArrayMixin(ExtensionOpsMixin, ExtensionArray):
+class DatetimeLikeArrayMixin(ExtensionArray):
     @property
     def ndim(self) -> int: ...
     @property

pandas-stubs/core/arrays/masked.pyi

@@ -3,10 +3,7 @@ from typing import (
     overload,
 )
 
-from pandas.core.arrays import (
-    ExtensionArray as ExtensionArray,
-    ExtensionOpsMixin,
-)
+from pandas.core.arrays import ExtensionArray as ExtensionArray
 from typing_extensions import Self
 
 from pandas._typing import (
@@ -18,7 +15,7 @@ from pandas._typing import (
     npt,
 )
 
-class BaseMaskedArray(ExtensionArray, ExtensionOpsMixin):
+class BaseMaskedArray(ExtensionArray):
     @overload
     def __getitem__(self, item: ScalarIndexer) -> Any: ...
     @overload

pandas-stubs/core/arrays/numpy_.pyi

@@ -3,10 +3,7 @@ from typing import Any
 
 import numpy as np
 from numpy.lib.mixins import NDArrayOperatorsMixin
-from pandas.core.arrays.base import (
-    ExtensionArray,
-    ExtensionOpsMixin,
-)
+from pandas.core.arrays.base import ExtensionArray
 
 from pandas.core.dtypes.dtypes import ExtensionDtype
 
@@ -21,4 +18,4 @@ class PandasDtype(ExtensionDtype):
     @property
     def itemsize(self) -> int: ...
 
-class PandasArray(ExtensionArray, ExtensionOpsMixin, NDArrayOperatorsMixin): ...
+class PandasArray(ExtensionArray, NDArrayOperatorsMixin): ...

pandas-stubs/core/arrays/sparse/array.pyi

@@ -5,10 +5,7 @@ from typing import (
     overload,
 )
 
-from pandas.core.arrays import (
-    ExtensionArray,
-    ExtensionOpsMixin,
-)
+from pandas.core.arrays import ExtensionArray
 from typing_extensions import Self
 
 from pandas._typing import (
@@ -22,7 +19,7 @@ from pandas._typing import (
 class ellipsis(Enum):
     Ellipsis = "..."
 
-class SparseArray(ExtensionArray, ExtensionOpsMixin):
+class SparseArray(ExtensionArray):
     def __init__(
         self,
         data,

tests/extension/decimal/array.py

@@ -27,10 +27,7 @@
 )
 from pandas.core import arraylike
 from pandas.core.arraylike import OpsMixin
-from pandas.core.arrays import (
-    ExtensionArray,
-    ExtensionScalarOpsMixin,
-)
+from pandas.core.arrays import ExtensionArray
 from pandas.core.indexers import check_array_indexer
 from pandas.core.series import Series
 from typing_extensions import Self
@@ -91,7 +88,7 @@ def _is_numeric(self) -> bool:
         return True
 
 
-class DecimalArray(OpsMixin, ExtensionScalarOpsMixin, ExtensionArray):
+class DecimalArray(OpsMixin, ExtensionArray):
     __array_priority__ = 1000
 
     def __init__(
@@ -355,5 +352,12 @@ def value_counts(self, dropna: bool = True) -> Series:
 
         return value_counts(self.to_numpy(), dropna=dropna)
 
+    @classmethod
+    def _add_arithmetic_ops(cls) -> None: ...
+    @classmethod
+    def _add_comparison_ops(cls) -> None: ...
+    @classmethod
+    def _add_logical_ops(cls) -> None: ...
+
 
 DecimalArray._add_arithmetic_ops()