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}
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