[jira] [Created] (ARROW-2141) [Python] Conversion from Numpy object array to varsize binary unimplemented

["Antoine Pitrou (JIRA)" <ji...@apache.org>]

Antoine Pitrou created ARROW-2141:
-------------------------------------

             Summary: [Python] Conversion from Numpy object array to varsize binary unimplemented
                 Key: ARROW-2141
                 URL: https://issues.apache.org/jira/browse/ARROW-2141
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
    Affects Versions: 0.8.0
            Reporter: Antoine Pitrou


{code:python}
>>> arr = np.array([b'xx'], dtype=np.object)
>>> pa.array(arr, type=pa.binary(2))
<pyarrow.lib.FixedSizeBinaryArray object at 0x7fe1ecaefa98>
[
  b'xx'
]
>>> pa.array(arr, type=pa.binary())
Traceback (most recent call last):
  File "<ipython-input-12-e40948b94b33>", line 1, in <module>
    pa.array(arr, type=pa.binary())
  File "array.pxi", line 177, in pyarrow.lib.array
  File "error.pxi", line 77, in pyarrow.lib.check_status
  File "error.pxi", line 85, in pyarrow.lib.check_status
ArrowNotImplementedError: /home/antoine/arrow/cpp/src/arrow/python/numpy_to_arrow.cc:1585 code: converter.Convert()
/home/antoine/arrow/cpp/src/arrow/python/numpy_to_arrow.cc:1098 code: compute::Cast(&context, *arr, type_, options, &casted)
/home/antoine/arrow/cpp/src/arrow/compute/kernels/cast.cc:1022 code: Cast(ctx, Datum(array.data()), out_type, options, &datum_out)
/home/antoine/arrow/cpp/src/arrow/compute/kernels/cast.cc:1009 code: GetCastFunction(*value.type(), out_type, options, &func)
No cast implemented from binary to binary
{code}



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