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https://issues.apache.org/jira/browse/ARROW-8285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche resolved ARROW-8285.
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Fix Version/s: 7.0.0
Resolution: Fixed
Issue resolved by pull request 11545
[https://github.com/apache/arrow/pull/11545]
> [Python][Dataset] ScalarExpression doesn't accept numpy scalars
> ---------------------------------------------------------------
>
> Key: ARROW-8285
> URL: https://issues.apache.org/jira/browse/ARROW-8285
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Uwe Korn
> Assignee: Alenka Frim
> Priority: Major
> Labels: pull-request-available
> Fix For: 7.0.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> {{pyarrow.dataset.ScalarExpression}} doesn't accept numpy scalars. This would
> be useful as values coming out of {{pandas}} or {{numpy}} are such.
> Example:
> {code:java}
> import pyarrow.dataset as ds
> import numpy as np
> ds.ScalarExpression(np.int64(2)){code}
> {code:java}
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
> <ipython-input-18-805083da7827> in <module>
> ----> 1 ds.ScalarExpression(np.int64(2))
> ~/miniconda3/envs/kartothek/lib/python3.7/site-packages/pyarrow/_dataset.pyx
> in pyarrow._dataset.ScalarExpression.__init__()
> TypeError: Not yet supported scalar value: 2 {code}
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