Joris Van den Bossche created ARROW-10882:
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Summary: [Python][Dataset] Writing dataset from python iterator of
record batches
Key: ARROW-10882
URL: https://issues.apache.org/jira/browse/ARROW-10882
Project: Apache Arrow
Issue Type: Improvement
Components: Python
Reporter: Joris Van den Bossche
At the moment, from python you can write a dataset with {{ds.write_dataset}}
for example starting from a *list* of record batches.
But this currently needs to be an actual list (or gets converted to a list), so
an iterator or generated gets fully consumed (potentially bringing the record
batches in memory), before starting to write.
We should also be able to use the python iterator itself to back a
{{RecordBatchIterator}}-like object, that can be consumed while writing the
batches.
We already have a {{arrow::py::PyRecordBatchReader}} that might be useful here.
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