Update pandas/core/generic.py

Co-authored-by: Matthew Roeschke <[email protected]>

Author: auderson

pandas/core/generic.py

@@ -9732,9 +9732,9 @@ def _where(
                 if not is_bool_dtype(cond):
                     raise TypeError(msg.format(dtype=cond.dtype))
             else:
-                for _dt in [blk.dtype for blk in cond._mgr.blocks]:
-                    if not is_bool_dtype(_dt):
-                        raise TypeError(msg.format(dtype=_dt))
+                for block in cond._mgr.blocks:
+                    if not is_bool_dtype(block.dtype):
+                        raise TypeError(msg.format(dtype=block.dtype))
                 if cond._mgr.any_extension_types:
                     # GH51574: avoid object ndarray conversion later on
                     cond = cond._constructor(