[jira] [Updated] (ARROW-1628) [Python] Incorrect serialization of numpy datetimes.

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joris Van den Bossche updated ARROW-1628:
-----------------------------------------
    Labels: pyarrow-serialization  (was: )

> [Python] Incorrect serialization of numpy datetimes.
> ----------------------------------------------------
>
>                 Key: ARROW-1628
>                 URL: https://issues.apache.org/jira/browse/ARROW-1628
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Robert Nishihara
>            Priority: Major
>              Labels: pyarrow-serialization
>
> See https://github.com/ray-project/ray/issues/1041.
> The issue can be reproduced as follows.
> {code}
> import pyarrow as pa
> import numpy as np
> t = np.datetime64(datetime.datetime.now())
> print(type(t), t)  # <class 'numpy.datetime64'> 2017-09-30T09:50:46.089952
> t_new = pa.deserialize(pa.serialize(t).to_buffer())
> print(type(t_new), t_new)  # <class 'int'> 0
> {code}



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