fixup col.dtype

Author: MarcoGorelli

pandas/core/interchange/buffer.py

@@ -115,7 +115,7 @@ def bufsize(self) -> int:
         """
         Buffer size in bytes.
         """
-        return self._buffer.size  # * self._length
+        return self._buffer.size
 
     @property
     def ptr(self) -> int:

pandas/core/interchange/column.py

@@ -160,6 +160,9 @@ def _dtype_from_pandasdtype(self, dtype) -> tuple[DtypeKind, int, str, str]:
         else:
             byteorder = dtype.byteorder
 
+        if dtype == "bool[pyarrow]":
+            return kind, dtype.itemsize, ArrowCTypes.BOOL, byteorder
+
         return kind, dtype.itemsize * 8, dtype_to_arrow_c_fmt(dtype), byteorder
 
     @property