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Posted to issues@arrow.apache.org by "Robert Nishihara (JIRA)" <ji...@apache.org> on 2017/09/30 17:04:00 UTC

[jira] [Created] (ARROW-1628) Incorrect pyarrow serialization of numpy datetimes.

Robert Nishihara created ARROW-1628:
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             Summary: Incorrect pyarrow 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


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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