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https://issues.apache.org/jira/browse/ARROW-1345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16362388#comment-16362388
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Uwe L. Korn commented on ARROW-1345:
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I think we have at the moment some assumptions on 64bit builds in the code.
They are not explicit but we have definitely never tested with 32bit.
> [Python] Conversion from nested NumPy arrays fails on integers other than
> int64, float32
> ----------------------------------------------------------------------------------------
>
> Key: ARROW-1345
> URL: https://issues.apache.org/jira/browse/ARROW-1345
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.8.0
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 0.9.0
>
>
> The inferred types are the largest ones, and then later conversion fails on
> any arrays with smaller types because only exact conversions are implemented
> thus far
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