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https://issues.apache.org/jira/browse/ARROW-1345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16361063#comment-16361063
]
Wes McKinney commented on ARROW-1345:
-------------------------------------
Looks like this might be working now (we should validate that this was broken
in 0.8.0, and add a unit test, though)
{code}
In [9]: pa.array(pd.Series([np.array([1,2,3], dtype='i4')]))
Out[9]:
<pyarrow.lib.ListArray object at 0x7f136c9a21d8>
[
[1,
2,
3]
]
{code}
however, this is a new bug/feature that merits its own JIRA:
{code}
In [11]: pa.array([np.array([1,2,3], dtype='i4')])
---------------------------------------------------------------------------
ArrowInvalid Traceback (most recent call last)
<ipython-input-11-56cfec0cffc2> in <module>()
----> 1 pa.array([np.array([1,2,3], dtype='i4')])
~/code/arrow/python/pyarrow/array.pxi in pyarrow.lib.array
(/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:29459)()
~/code/arrow/python/pyarrow/array.pxi in pyarrow.lib._sequence_to_array
(/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:27980)()
~/code/arrow/python/pyarrow/error.pxi in pyarrow.lib.check_status
(/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:8298)()
ArrowInvalid: ../src/arrow/python/builtin_convert.cc:941 code:
InferArrowType(seq, &real_type)
../src/arrow/python/builtin_convert.cc:325 code: seq_visitor.Visit(obj)
../src/arrow/python/builtin_convert.cc:195 code: VisitElem(ref, level)
Error inferring Arrow data type for collection of Python objects. Got Python
object of type ndarray but can only handle these types: bool, float, integer,
date, datetime, bytes, unicode
{code}
> [Python] Conversion from nested NumPy arrays fails on integers other than
> int64, float32
> ----------------------------------------------------------------------------------------
>
> Key: ARROW-1345
> URL: https://issues.apache.org/jira/browse/ARROW-1345
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.8.0
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 0.9.0
>
>
> The inferred types are the largest ones, and then later conversion fails on
> any arrays with smaller types because only exact conversions are implemented
> thus far
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