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https://issues.apache.org/jira/browse/ARROW-14732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche reassigned ARROW-14732:
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Assignee: Joris Van den Bossche
> [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
> Assignee: Joris Van den Bossche
> Priority: Major
>
> 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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