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https://issues.apache.org/jira/browse/ARROW-8572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson resolved ARROW-8572.
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Fix Version/s: 1.0.0
Resolution: Fixed
Issue resolved by pull request 7027
[https://github.com/apache/arrow/pull/7027]
> [Python] Expose UnionArray.array and other fields
> -------------------------------------------------
>
> Key: ARROW-8572
> URL: https://issues.apache.org/jira/browse/ARROW-8572
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Affects Versions: 0.17.0
> Reporter: David Li
> Assignee: David Li
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently in Python, you can construct a UnionArray easily, but getting the
> data back out (without copying) is near-impossible. We should expose the
> getter for UnionArray.array so we can pull out the constituent arrays. We
> should also expose fields like mode while we're at it.
> The use case is: in Flight, we'd like to write multiple distinct datasets
> (with distinct schemas) in a single logical call; using UnionArrays lets us
> combine these datasets into a single logical dataset.
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