TYP: use Shape alias in core/io/pytables.py

Author: arw2019

pandas/io/pytables.py

@@ -28,7 +28,7 @@
 
 from pandas._libs import lib, writers as libwriters
 from pandas._libs.tslibs import timezones
-from pandas._typing import ArrayLike, FrameOrSeries, FrameOrSeriesUnion, Label
+from pandas._typing import ArrayLike, FrameOrSeries, FrameOrSeriesUnion, Label, Shape
 from pandas.compat._optional import import_optional_dependency
 from pandas.compat.pickle_compat import patch_pickle
 from pandas.errors import PerformanceWarning
@@ -3087,7 +3087,7 @@ class BlockManagerFixed(GenericFixed):
     nblocks: int
 
     @property
-    def shape(self):
+    def shape(self) -> Optional[Shape]:
         try:
             ndim = self.ndim