Switch to KeyError.

Author: DriesSchaumont

pandas/core/indexing.py

@@ -966,7 +966,7 @@ def _validate_key(self, key, axis: int):
         # slice of integers (only if in the labels)
         # boolean not in slice and with boolean index
         if isinstance(key, bool) and not is_bool_dtype(self.obj.index):
-            raise TypeError("Boolean label can not be used without a boolean index")
+            raise KeyError("Boolean label can not be used without a boolean index")
 
         if isinstance(key, slice) and (
             isinstance(key.start, bool) or isinstance(key.stop, bool)

pandas/tests/frame/indexing/test_indexing.py

@@ -948,9 +948,9 @@ def test_getitem_setitem_ix_bool_keyerror(self):
         # #2199
         df = DataFrame({"a": [1, 2, 3]})
         message = "Boolean label can not be used without a boolean index"
-        with pytest.raises(TypeError, match=message):
+        with pytest.raises(KeyError, match=message):
             df.loc[False]
-        with pytest.raises(TypeError, match=message):
+        with pytest.raises(KeyError, match=message):
             df.loc[True]
 
         msg = "cannot use a single bool to index into setitem"

pandas/tests/indexing/test_loc.py

@@ -2091,7 +2091,7 @@ def test_loc_bool_incompatible_index_raises(self, index, frame_or_series):
         message = "Boolean label can not be used without a boolean index"
         if index.inferred_type != "boolean":
             obj = frame_or_series(index=index)
-            with pytest.raises(TypeError, match=message):
+            with pytest.raises(KeyError, match=message):
                 obj.loc[True]
 
     def test_loc_bool_should_not_raise(self, frame_or_series):