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https://issues.apache.org/jira/browse/ARROW-2278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-2278.
-----------------------------------
    Resolution: Done

This has been fixed in the meantime, not sure in which issue.

> [Python] deserializing Numpy struct arrays raises
> -------------------------------------------------
>
>                 Key: ARROW-2278
>                 URL: https://issues.apache.org/jira/browse/ARROW-2278
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 0.8.0
>            Reporter: Antoine Pitrou
>            Assignee: Licht Takeuchi
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> {code:python}
> >>> import numpy as np
> >>> dt = np.dtype([('x', np.int8), ('y', np.float32)])
> >>> arr = np.arange(5*10, dtype=np.int8).view(dt)
> >>> pa.deserialize(pa.serialize(arr).to_buffer())
> Traceback (most recent call last):
>   File "<ipython-input-13-6810c780d033>", line 1, in <module>
>     pa.deserialize(pa.serialize(arr).to_buffer())
>   File "serialization.pxi", line 441, in pyarrow.lib.deserialize
>   File "serialization.pxi", line 404, in pyarrow.lib.deserialize_from
>   File "serialization.pxi", line 257, in 
> pyarrow.lib.SerializedPyObject.deserialize
>   File "serialization.pxi", line 174, in 
> pyarrow.lib.SerializationContext._deserialize_callback
>   File "/home/antoine/arrow/python/pyarrow/serialization.py", line 44, in 
> _deserialize_numpy_array_list
>     return np.array(data[0], dtype=np.dtype(data[1]))
> TypeError: a bytes-like object is required, not 'int'
> {code}



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