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https://issues.apache.org/jira/browse/ARROW-1714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16238982#comment-16238982
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ASF GitHub Bot commented on ARROW-1714:
---------------------------------------
Licht-T commented on issue #1263: ARROW-1714: [Python] Fix invalid
serialization/deserialization None name Series
URL: https://github.com/apache/arrow/pull/1263#issuecomment-341894650
@wesm I found the reason why it won't work.
https://github.com/apache/arrow/commit/b221a2c7a08f4f709c3a4eb4b2d68dae16c82da8
does not treat when some `labels` are `-1`.
```python
>>> pd.MultiIndex.from_tuples([(1,)])
MultiIndex(levels=[[1]],
labels=[[0]])
>>> pd.MultiIndex.from_tuples([(None,)])
MultiIndex(levels=[[]],
labels=[[-1]])
```
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> [Python] No named pd.Series name serialized as u'None'
> ------------------------------------------------------
>
> Key: ARROW-1714
> URL: https://issues.apache.org/jira/browse/ARROW-1714
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.7.1
> Reporter: Licht Takeuchi
> Assignee: Licht Takeuchi
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> Repro code.
> {code:java}
> import pandas as pd
> import pyarrow as pa
> s = pd.Series([1,2,3,4])
> serialized = pa.serialize(s).to_buffer()
> pa.deserialize(serialized).name
> {code}
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