[jira] [Resolved] (ARROW-7362) [Python] ListArray.flatten() should take care of slicing offsets

["Antoine Pitrou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-7362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou resolved ARROW-7362.
-----------------------------------
    Fix Version/s: 1.0.0
       Resolution: Fixed

Issue resolved by pull request 6006
[https://github.com/apache/arrow/pull/6006]

> [Python] ListArray.flatten() should take care of slicing offsets
> ----------------------------------------------------------------
>
>                 Key: ARROW-7362
>                 URL: https://issues.apache.org/jira/browse/ARROW-7362
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++, Python
>            Reporter: Zhuo Peng
>            Assignee: Zhuo Peng
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 1.0.0
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> Currently ListArray.flatten() simply returns the child array. If a ListArray is a slice of another ListArray, they will share the same child array, however the expected behavior (I think) of flatten() should be returning an Array that's a concatenation of all the sub-lists in the ListArray, so the slicing offset should be taken into account.
>  
> For example:
> a = pa.array([[1], [2], [3]])
> assert a.flatten().equals(pa.array([1,2,3]))
> # expected:
> a.slice(1).flatten().equals(pa.array([2, 3]))



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