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https://issues.apache.org/jira/browse/ARROW-1678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16206123#comment-16206123
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ASF GitHub Bot commented on ARROW-1678:
---------------------------------------
GitHub user Licht-T opened a pull request:
https://github.com/apache/arrow/pull/1205
ARROW-1678: [Python] Implement numpy.float16 SerDe
This is the patch for
[ARROW-1678](https://issues.apache.org/jira/projects/ARROW/issues/ARROW-1678).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Licht-T/arrow feature-halffloat-python-serde
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/arrow/pull/1205.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1205
----
commit 7348cc6761a9d94da029123365e0dd24d86f69de
Author: Licht-T <[email protected]>
Date: 2017-10-16T15:55:39Z
ENH: Add HalfFloat BUILDER_CASE
commit 0be305a3443b897dcc2d99e72a5d808e02bb768a
Author: Licht-T <[email protected]>
Date: 2017-10-16T15:56:39Z
ENH: Add the IPC internal metadata for HalfFloat
commit dda98b9e013947a7172c35b71e7a0d79027cd99d
Author: Licht-T <[email protected]>
Date: 2017-10-16T15:59:43Z
ENH: Add HalfFloat type traits
commit 9d19e0866da1feecc82f1ac4bda8bcfa57f6ca41
Author: Licht-T <[email protected]>
Date: 2017-10-16T16:01:28Z
ENH: Add HalfFloat type case for numpy
commit 02dc77b7e8a6439efd3dedad461191c47eb15627
Author: Licht-T <[email protected]>
Date: 2017-10-16T16:04:55Z
ENH: Add numpy.float16 serializer
commit 834357e7d3bb1e1cf8dc0a0383854c7e3818d38f
Author: Licht-T <[email protected]>
Date: 2017-10-16T16:05:50Z
ENH: Add numpy.float16 deserializer
commit 66d5f15abb439c3ac63f87c44cc97e517b5d6ec5
Author: Licht-T <[email protected]>
Date: 2017-10-16T16:06:41Z
ENH: Set VISIT_INLINE for HalfFloat
commit f19e543129c49145ec6ac058b73a60c943f7413a
Author: Licht-T <[email protected]>
Date: 2017-10-16T16:07:47Z
TST: Add tests for numpy.float16 SerDe
----
> [Python] Incorrect serialization of numpy.float16
> -------------------------------------------------
>
> Key: ARROW-1678
> URL: https://issues.apache.org/jira/browse/ARROW-1678
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.7.1
> Reporter: Licht Takeuchi
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> The issue can be reproduced as follows.
> {code:python}
> import pyarrow as pa
> import numpy as np
> t = np.float16(-1.1)
> print(type(t), t) # <class 'numpy.float16'> -1.0996
> p = pa.serialize(t)
> t_new = pa.deserialize(p.to_buffer())
> print(type(t_new), t_new) # <class 'int'> 0
> {code}
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