_setitem_frame(): use blk.dtype

Author: auderson

pandas/core/frame.py

@@ -4281,7 +4281,7 @@ def _setitem_frame(self, key, value) -> None:
                 raise ValueError("Array conditional must be same shape as self")
             key = self._constructor(key, **self._construct_axes_dict(), copy=False)
 
-        if key.size and not all(is_bool_dtype(dtype) for dtype in key.dtypes):
+        if key.size and not all(is_bool_dtype(blk.dtype) for blk in key._mgr.blocks):
             raise TypeError(
                 "Must pass DataFrame or 2-d ndarray with boolean values only"
             )