[jira] [Created] (ARROW-6349) ArrowInvalid: Negative ndarray strides not supported

["YUTING ZHANG (Jira)" <ji...@apache.org>]

YUTING ZHANG created ARROW-6349:
-----------------------------------

             Summary: ArrowInvalid: Negative ndarray strides not supported
                 Key: ARROW-6349
                 URL: https://issues.apache.org/jira/browse/ARROW-6349
             Project: Apache Arrow
          Issue Type: Bug
         Environment: Ubuntu 16.04, python 3.6.6, numpy 1.14.6, pyarrow 0.11.1
            Reporter: YUTING ZHANG


When indexing a np.ndarray with negative stride, arrow cannot serialize it. However, this could be a common use case for reversing along an axis. 

 

Code:
{code:java}
import pyarrow
import numpy as np
a=np.zeros([500,600,3])
b=a[:,:,::-1]
pyarrow.serialize(b)
{code}
 

Error:
{code:java}
ArrowInvalid Traceback (most recent call last)
<ipython-input-7-bf252de95dc1> in <module>()
----> 1 pyarrow.serialize(b)
~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/pyarrow/serialization.pxi in pyarrow.lib.serialize()
~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/pyarrow/error.pxi in pyarrow.lib.check_status()
ArrowInvalid: Negative ndarray strides not supported
{code}
 

 



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