[jira] [Created] (ARROW-8285) [Python][Dataset] ScalarExpression doesn't accept numpy scalars

["Uwe Korn (Jira)" <ji...@apache.org>]

Uwe Korn created ARROW-8285:
-------------------------------

             Summary: [Python][Dataset] ScalarExpression doesn't accept numpy scalars
                 Key: ARROW-8285
                 URL: https://issues.apache.org/jira/browse/ARROW-8285
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
            Reporter: Uwe Korn


{{pyarrow.dataset.ScalarExpression}} doesn't accept numpy scalars. This would be useful as values coming out of {{pandas}} or {{numpy}} are such.

Example:
{code:java}
import pyarrow.dataset as ds
import numpy as np

ds.ScalarExpression(np.int64(2)){code}
{code:java}
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-18-805083da7827> in <module>
----> 1 ds.ScalarExpression(np.int64(2))

~/miniconda3/envs/kartothek/lib/python3.7/site-packages/pyarrow/_dataset.pyx in pyarrow._dataset.ScalarExpression.__init__()

TypeError: Not yet supported scalar value: 2 {code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)