SAY-5 commented on PR #49833:
URL: https://github.com/apache/arrow/pull/49833#issuecomment-4531627997
Re: the TypeError catch: the TypeError caught in _binop_or_notimplemented is
specifically the one Python/Cython raises when call_function cannot convert the
right operand to an Arrow type. Pyarrow-to-pyarrow type mismatches (e.g.,
pa.scalar("a") + pa.scalar(1.0)) raise ArrowNotImplementedError (subclass of
NotImplementedError, not TypeError), so those propagate unchanged, as verified
by test_dunders_unmatching_types. The concern about non-dispatch TypeErrors is
valid; I can narrow the catch to check error message prefix if preferred.
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