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https://issues.apache.org/jira/browse/ARROW-3829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17660852#comment-17660852
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Rok Mihevc commented on ARROW-3829:
-----------------------------------
This issue has been migrated to [issue
#20293|https://github.com/apache/arrow/issues/20293] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [Python] Support protocols to extract Arrow objects from third-party classes
> ----------------------------------------------------------------------------
>
> Key: ARROW-3829
> URL: https://issues.apache.org/jira/browse/ARROW-3829
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Uwe Korn
> Assignee: Joris Van den Bossche
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.15.0
>
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> In the style of NumPy's {{__array__}}, we should be able to ask inputs to
> {{pa.array}}, {{pa.Table.from_X}}, ... whether they can convert themselves to
> Arrow objects. This would allow for example to turn objects that hold an
> Arrow object internally to expose them directly instead of going a conversion
> path.
> My current use case involves Pandas {{ExtensionArray}} instances that
> internally have Arrow objects and should be reused when we pass the whole
> {{DataFrame}} to {{pa.Table.from_pandas}}.
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