pyright fixup

Author: jbrockmendel

pandas/core/indexes/timedeltas.py

@@ -361,23 +361,27 @@ def timedelta_range(
         if start is not None and end is not None:
             start = Timedelta(start)
             end = Timedelta(end)
+            start = cast(Timedelta, start)
+            end = cast(Timedelta, end)
             if abbrev_to_npy_unit(start.unit) > abbrev_to_npy_unit(end.unit):
                 unit = cast("TimeUnit", start.unit)
             else:
                 unit = cast("TimeUnit", end.unit)
         elif start is not None:
             start = Timedelta(start)
+            start = cast(Timedelta, start)
             unit = cast("TimeUnit", start.unit)
         else:
             end = Timedelta(end)
+            end = cast(Timedelta, end)
             unit = cast("TimeUnit", end.unit)
 
         # Last we need to watch out for cases where the 'freq' implies a higher
         #  unit than either start or end
         if freq is not None:
             freq = cast("Tick | Day", freq)
             creso = abbrev_to_npy_unit(unit)
-            if freq._creso > creso:
+            if freq._creso > creso:  # pyright: ignore[reportAttributeAccessIssue]
                 unit = cast("TimeUnit", freq.base.freqstr)
 
     tdarr = TimedeltaArray._generate_range(