Zhuo Peng created ARROW-7362:
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Summary: [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
Reporter: Zhuo Peng
Assignee: Zhuo Peng
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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