[jira] [Created] (ARROW-14732) [Python] Improve error message in compute functions when passing wrong positional/keyword arguments

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

Joris Van den Bossche created ARROW-14732:
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             Summary: [Python] Improve error message in compute functions when passing wrong positional/keyword arguments
                 Key: ARROW-14732
                 URL: https://issues.apache.org/jira/browse/ARROW-14732
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
            Reporter: Joris Van den Bossche


From https://stackoverflow.com/questions/69990087/how-to-use-pyarrow-compute-is-in-function

Small example of the current error messages:

{code:python}
array1 = pa.array([1,2,3,4])
array2 = pa.array([1,4])

import pyarrow.compute as pc

# Using positional for value_set as well (the signature indicates with * that this are keyword
# only arguments, but the error message is still confusing compared to plain python
>>> pc.is_in(array1, array2)
ArrowInvalid: Function is_in accepts 1 arguments but attempted to look up kernel(s) with 2

# Using keyword for the first argument (which is allowed in pure python functions)
# gives confusing error message because it passes it to the options
>>> pc.is_in(values=array1,value_set=array2)
...
~/scipy/repos/arrow/python/pyarrow/_compute.pyx in pyarrow._compute.SetLookupOptions.__init__()

TypeError: __init__() got an unexpected keyword argument 'values'
{code}

I think it should be quite easy to improve the error messaging on this front, since we know how many arguments the kernel takes.

cc [~amol-] 



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