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From "Uwe L. Korn (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (ARROW-511) [Python] List[T] conversions not implemented for single arrays
Date Sun, 05 Feb 2017 09:32:41 GMT

     [ https://issues.apache.org/jira/browse/ARROW-511?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Uwe L. Korn reassigned ARROW-511:
---------------------------------

    Assignee: Uwe L. Korn

> [Python] List[T] conversions not implemented for single arrays
> --------------------------------------------------------------
>
>                 Key: ARROW-511
>                 URL: https://issues.apache.org/jira/browse/ARROW-511
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Wes McKinney
>            Assignee: Uwe L. Korn
>
> It works for tables, though
> {code}
> In [2]: import pyarrow as pa
> In [3]: arr = pa.from_pylist([[1,2,3], None, [1, 2], [], [4]])
> In [4]: arr.to_pandas()
> ---------------------------------------------------------------------------
> ArrowException                            Traceback (most recent call last)
> <ipython-input-4-fb16f53a4747> in <module>()
> ----> 1 arr.to_pandas()
> /home/wesm/code/arrow/python/pyarrow/array.pyx in pyarrow.array.Array.to_pandas (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/array.cxx:4271)()
> /home/wesm/code/arrow/python/pyarrow/error.pyx in pyarrow.error.check_status (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/error.cxx:1197)()
> ArrowException: NotImplemented: Arrow type reading not implemented for list<item:
int64>
> {code}



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