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https://issues.apache.org/jira/browse/ARROW-2342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16409741#comment-16409741
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ASF GitHub Bot commented on ARROW-2342:
---------------------------------------
pitrou opened a new pull request #1780: ARROW-2342: [Python] Allow pickling
more types
URL: https://github.com/apache/arrow/pull/1780
Several types (bool, timestamp with a non-None timezone, floats) were
unpicklable.
Based on PR #1778.
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> [Python] Aware timestamp type fails pickling
> --------------------------------------------
>
> Key: ARROW-2342
> URL: https://issues.apache.org/jira/browse/ARROW-2342
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.9.0
> Reporter: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
>
> {code:python}
> >>> ty = pa.timestamp('ms')
> >>> pickle.loads(pickle.dumps(ty))
> TimestampType(timestamp[ms])
> >>> ty = pa.timestamp('ms', tz='UTC')
> >>> pickle.loads(pickle.dumps(ty))
> Traceback (most recent call last):
> File "<ipython-input-15-889e5adab733>", line 1, in <module>
> pickle.loads(pickle.dumps(ty))
> File "types.pxi", line 82, in pyarrow.lib.DataType.__setstate__
> File "types.pxi", line 1246, in pyarrow.lib.type_for_alias
> ValueError: No type alias for timestamp[ms, tz=utc]
> {code}
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