pitrou commented on a change in pull request #11354:
URL: https://github.com/apache/arrow/pull/11354#discussion_r726029465
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File path: python/pyarrow/_flight.pyx
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@@ -1950,6 +1954,9 @@ cdef CStatus _do_action(void* self, const
CServerCallContext& context,
return (<FlightError> flight_error).to_status()
# Let the application return an iterator or anything convertible
# into one
+ if responses is None:
Review comment:
In which circumstance is this possible? `None` is not an iterable.
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