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https://issues.apache.org/jira/browse/ARROW-2856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16546813#comment-16546813
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Antoine Pitrou commented on ARROW-2856:
---------------------------------------
Yes, we raise on NaN as well:
{code:python}
>>> pa.array([float('nan')], type=pa.int8())
Traceback (most recent call last):
File "<ipython-input-3-357aa3c7f8d3>", line 1, in <module>
pa.array([float('nan')], type=pa.int8())
File "pyarrow/array.pxi", line 186, in pyarrow.lib.array
return _sequence_to_array(obj, size, type, pool, from_pandas)
File "pyarrow/array.pxi", line 40, in pyarrow.lib._sequence_to_array
check_status(
File "pyarrow/error.pxi", line 81, in pyarrow.lib.check_status
raise ArrowInvalid(message)
ArrowInvalid: ../src/arrow/python/builtin_convert.cc:920 code:
AppendPySequence(seq, size, real_type, builder.get(), from_pandas)
../src/arrow/python/iterators.h:60 code: func(value)
../src/arrow/python/builtin_convert.cc:454 code: internal::CIntFromPython(obj,
&value)
../src/arrow/python/helpers.cc:259 code: CheckPyError()
cannot convert float NaN to integer
{code}
> [Python/C++] Array constructor should not truncate floats when casting to int
> -----------------------------------------------------------------------------
>
> Key: ARROW-2856
> URL: https://issues.apache.org/jira/browse/ARROW-2856
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.9.0
> Reporter: Florian Jetter
> Priority: Minor
> Fix For: 0.10.0
>
>
> I would expect the following code to raise instead of truncating the float
> {code}
> In [4]: pa.array([1.9], type=pa.int8())
> Out[4]:
> <pyarrow.lib.Int8Array object at 0x113455e58>
> [
> 1
> ]
> {code}
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