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https://issues.apache.org/jira/browse/ARROW-1646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16325558#comment-16325558
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ASF GitHub Bot commented on ARROW-1646:
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xhochy opened a new pull request #1475: ARROW-1646: [Python] Handle NumPy
scalar types
URL: https://github.com/apache/arrow/pull/1475
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> [Python] pyarrow.array cannot handle NumPy scalar types
> -------------------------------------------------------
>
> Key: ARROW-1646
> URL: https://issues.apache.org/jira/browse/ARROW-1646
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.7.1
> Reporter: Wes McKinney
> Assignee: Uwe L. Korn
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> Example repro
> {code}
> In [1]: import pyarrow as pa
> impo
> In [2]: import numpy as np
> In [3]: pa.array([np.random.randint(0, 10, size=5), None])
> ---------------------------------------------------------------------------
> ArrowInvalid Traceback (most recent call last)
> <ipython-input-3-b364fa5d75aa> in <module>()
> ----> 1 pa.array([np.random.randint(0, 10, size=5), None])
> /home/wesm/code/arrow/python/pyarrow/array.pxi in pyarrow.lib.array
> (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:24892)()
> 171 if mask is not None:
> 172 raise ValueError("Masks only supported with ndarray-like
> inputs")
> --> 173 return _sequence_to_array(obj, size, type, pool)
> 174
> 175
> /home/wesm/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:23496)()
> 23 if type is None:
> 24 with nogil:
> ---> 25 check_status(ConvertPySequence(sequence, pool, &out))
> 26 else:
> 27 if size is None:
> /home/wesm/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:7876)()
> 75 message = frombytes(status.message())
> 76 if status.IsInvalid():
> ---> 77 raise ArrowInvalid(message)
> 78 elif status.IsIOError():
> 79 raise ArrowIOError(message)
> ArrowInvalid:
> /home/wesm/code/arrow/cpp/src/arrow/python/builtin_convert.cc:740 code:
> InferArrowTypeAndSize(obj, &size, &type)
> /home/wesm/code/arrow/cpp/src/arrow/python/builtin_convert.cc:319 code:
> InferArrowType(obj, out_type)
> /home/wesm/code/arrow/cpp/src/arrow/python/builtin_convert.cc:299 code:
> seq_visitor.Visit(obj)
> /home/wesm/code/arrow/cpp/src/arrow/python/builtin_convert.cc:180 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}
> If these inner values are converted to Python built-in int types then it
> works fine
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