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From "Uwe L. Korn (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARROW-371) Python: Table with null timestamp becomes float in pandas
Date Mon, 14 Nov 2016 10:53:58 GMT

    [ https://issues.apache.org/jira/browse/ARROW-371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15663456#comment-15663456
] 

Uwe L. Korn commented on ARROW-371:
-----------------------------------

PR: https://github.com/apache/arrow/pull/205

> Python: Table with null timestamp becomes float in pandas
> ---------------------------------------------------------
>
>                 Key: ARROW-371
>                 URL: https://issues.apache.org/jira/browse/ARROW-371
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 0.1.0
>            Reporter: Jochen Ott
>            Assignee: Uwe L. Korn
>            Priority: Minor
>
> I'm testing round-trip of pandas DataFrame to arrow Table and back.
> Converting a pandas DataFrame with pd.Timestamp columns and NaT entries to a Table seems
to work fine (null count and data type of the column match expectations). However, converting
the Table back to a DataFrame represents the column as float64, not as pandas.Timestamp/numpy.datetime64[ns]
as expected.



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