jorisvandenbossche commented on code in PR #41889:
URL: https://github.com/apache/arrow/pull/41889#discussion_r1638043444
##########
python/pyarrow/io.pxi:
##########
@@ -1424,6 +1430,18 @@ cdef class Buffer(_Weakrefable):
are_equal : bool
True if buffer contents and size are equal
"""
+ if self.device != other.device:
+ raise ValueError(
+ "Device on which the data resides differs between buffers: "
+ f"{self.device.type_name} and {other.device.type_name}."
+ )
+ if not self.is_cpu and not other.is_cpu:
Review Comment:
```suggestion
if not self.is_cpu:
```
(because you now already checked the devices are equal, just checking for
`self.is_cpu` should be sufficient)
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