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https://issues.apache.org/jira/browse/ARROW-9376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney updated ARROW-9376:
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Summary: [Python] Type-hint related errors in PyCharm IDE (was: [Python])
> [Python] Type-hint related errors in PyCharm IDE
> ------------------------------------------------
>
> Key: ARROW-9376
> URL: https://issues.apache.org/jira/browse/ARROW-9376
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.17.1
> Reporter: Athanassios Hatzis
> Priority: Minor
>
> h3. First try
> {code:python}
> data = [pa.array([1, 2, 3, 4]), pa.array(['foo', 'bar', 'baz', None]),
> pa.array([True, None, False, True])]
> batch = pa.RecordBatch.from_arrays(data, ['f0', 'f1', 'f2'])
> {code}
> Hi, I use PyCharm IDE for development and I am getting the following
> inspection description when I write this piece of code above in the editor.
> _Expected type 'RecordBatch', got 'List[Union[Union[ChunkedArray, Array],
> Any]]' instead_
> _Inspection info: This inspection detects type errors in function call
> expressions. Due to dynamic dispatch and duck typing, this is possible in a
> limited but useful number of cases. Types of function parameters can be
> specified in docstrings or in Python 3 function annotations._
> h3. Second try
> {code:python}
> batch = pa.RecordBatch.from_arrays(data, names=['f0', 'f1', 'f2']){code}
> Then you get an insection descriptions
> _Parameter 'list_arrays' unfilled_
> _Passing list instead of pyarrow.lib.RecordBatch.RecordBatch. Is this
> intentional?_
> h3. Third try
> {code:python}
> batch = pa.RecordBatch.from_arrays(list_arrays=data, names=['f0', 'f1', 'f2'])
> {code}
> Then you get an insection description and a type error
> _Parameter 'self' unfilled_
> _TypeError: from_arrays() takes at least 1 positional argument (0 given)_
>
> Similar response, behaviour happens with the pa.Table.from_arrays
>
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