fixes type annotations

Author: datajanko

pandas/core/frame.py

@@ -79,7 +79,7 @@
 )
 from pandas.core.dtypes.missing import isna, notna
 
-from pandas._typing import Axes, Dtype
+from pandas._typing import Axes, Dtype, DType
 from pandas.core import algorithms, common as com, nanops, ops
 from pandas.core.accessor import CachedAccessor
 from pandas.core.arrays import Categorical, ExtensionArray
@@ -3484,8 +3484,8 @@ def select_dtypes(self, include=None, exclude=None):
         keep_these = np.full(self.shape[1], True)
 
         def extract_unique_dtypes_from_dtypes_list(
-            dtypes_list: List[Type], unique_dtypes: List[Type]
-        ) -> List[Type]:
+            dtypes_list: FrozenSet[DType], unique_dtypes: np.ndarray
+        ) -> List[DType]:
             extracted_dtypes = []
             for unique_dtype in unique_dtypes:
                 if any(issubclass(unique_dtype.type, dtype) for dtype in dtypes_list):