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https://issues.apache.org/jira/browse/ARROW-1950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16355924#comment-16355924
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ASF GitHub Bot commented on ARROW-1950:
---------------------------------------
xhochy commented on a change in pull request #1571: ARROW-1950: [Python]
pandas_type in pandas metadata incorrect for List types
URL: https://github.com/apache/arrow/pull/1571#discussion_r166728024
##########
File path: python/pyarrow/tests/test_convert_pandas.py
##########
@@ -1404,6 +1404,57 @@ def test_empty_list_roundtrip(self):
tm.assert_frame_equal(result, df)
+ def test_empty_list_metadata(self):
+ # Create table with array of empty lists, forced to have type
+ # list(string) in pyarrow
+ c1 = [["test"], ["a", "b"], None]
+ c2 = [[], [], []]
+ arrays = {
Review comment:
You will need to use `OrderedDict` here probably to get the same ordering of
the results in all Python versions.
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> [Python] pandas_type in pandas metadata incorrect for List types
> ----------------------------------------------------------------
>
> Key: ARROW-1950
> URL: https://issues.apache.org/jira/browse/ARROW-1950
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Wes McKinney
> Assignee: Phillip Cloud
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> see https://github.com/pandas-dev/pandas/pull/18201#issuecomment-353042438
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