CLN: remove unnecessary Categorical._validate_setitem_key (#37068)

Author: jbrockmendel

pandas/core/arrays/categorical.py

@@ -9,7 +9,7 @@
 
 from pandas._config import get_option
 
-from pandas._libs import NaT, algos as libalgos, hashtable as htable, lib
+from pandas._libs import NaT, algos as libalgos, hashtable as htable
 from pandas._typing import ArrayLike, Dtype, Ordered, Scalar
 from pandas.compat.numpy import function as nv
 from pandas.util._decorators import cache_readonly, deprecate_kwarg
@@ -1907,32 +1907,6 @@ def _validate_setitem_value(self, value):
 
         return self._unbox_listlike(rvalue)
 
-    def _validate_setitem_key(self, key):
-        if lib.is_integer(key):
-            # set by position
-            pass
-
-        elif isinstance(key, tuple):
-            # tuple of indexers (dataframe)
-            # only allow 1 dimensional slicing, but can
-            # in a 2-d case be passed (slice(None),....)
-            if len(key) == 2:
-                if not com.is_null_slice(key[0]):
-                    raise AssertionError("invalid slicing for a 1-ndim categorical")
-                key = key[1]
-            elif len(key) == 1:
-                key = key[0]
-            else:
-                raise AssertionError("invalid slicing for a 1-ndim categorical")
-
-        elif isinstance(key, slice):
-            # slicing in Series or Categorical
-            pass
-
-        # else: array of True/False in Series or Categorical
-
-        return super()._validate_setitem_key(key)
-
     def _reverse_indexer(self) -> Dict[Hashable, np.ndarray]:
         """
         Compute the inverse of a categorical, returning

pandas/core/internals/blocks.py

@@ -2008,25 +2008,21 @@ class NumericBlock(Block):
     _can_hold_na = True
 
 
-class FloatOrComplexBlock(NumericBlock):
-    __slots__ = ()
-
-
-class FloatBlock(FloatOrComplexBlock):
+class FloatBlock(NumericBlock):
     __slots__ = ()
     is_float = True
 
     def _can_hold_element(self, element: Any) -> bool:
         tipo = maybe_infer_dtype_type(element)
         if tipo is not None:
             return issubclass(tipo.type, (np.floating, np.integer)) and not issubclass(
-                tipo.type, (np.datetime64, np.timedelta64)
+                tipo.type, np.timedelta64
             )
         return isinstance(
             element, (float, int, np.floating, np.int_)
         ) and not isinstance(
             element,
-            (bool, np.bool_, datetime, timedelta, np.datetime64, np.timedelta64),
+            (bool, np.bool_, np.timedelta64),
         )
 
     def to_native_types(
@@ -2063,7 +2059,7 @@ def to_native_types(
         return self.make_block(res)
 
 
-class ComplexBlock(FloatOrComplexBlock):
+class ComplexBlock(NumericBlock):
     __slots__ = ()
     is_complex = True
 
@@ -2086,7 +2082,7 @@ def _can_hold_element(self, element: Any) -> bool:
         if tipo is not None:
             return (
                 issubclass(tipo.type, np.integer)
-                and not issubclass(tipo.type, (np.datetime64, np.timedelta64))
+                and not issubclass(tipo.type, np.timedelta64)
                 and self.dtype.itemsize >= tipo.itemsize
             )
         # We have not inferred an integer from the dtype