[jira] [Updated] (ARROW-16174) [Python] FixedSizeListArray.flatten() ignores slicing offsets

["Jacob Wujciak-Jens (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-16174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacob Wujciak-Jens updated ARROW-16174:
---------------------------------------
    Summary: [Python] FixedSizeListArray.flatten() ignores slicing offsets  (was: FixedSizeListArray.flatten() ignores slicing offsets)

> [Python] FixedSizeListArray.flatten() ignores slicing offsets
> -------------------------------------------------------------
>
>                 Key: ARROW-16174
>                 URL: https://issues.apache.org/jira/browse/ARROW-16174
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 7.0.0
>         Environment: Windows 10
>            Reporter: Sergey Mozharov
>            Priority: Major
>
> Related to ARROW-7362, which is not resolved for fixed size arrays:
> {code:java}
> import pyarrow as pa
> array = pa.array([[1], [2], [3]], type=pa.list_(pa.float64(), list_size=1))
> assert array[2:].flatten() != array.flatten()  # <-- assertion fails
> # expected behavior
> assert array[2:].flatten() == pa.array([3], type=pa.float64()){code}
> Variable size lists behave as expected:
> {code:java}
> array = pa.array([[1], [2], [3]], type=pa.list_(pa.float64()))
> assert array[2:].flatten() != array.flatten()  # pass
> assert array[2:].flatten() == pa.array([3], type=pa.float64())  # pass{code}



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