[jira] [Updated] (ARROW-3448) [Python] Pandas roundtrip doesn't preserve list of datetime objects

["Wes McKinney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-3448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated ARROW-3448:
--------------------------------
    Fix Version/s: 0.14.0

> [Python] Pandas roundtrip doesn't preserve list of datetime objects
> -------------------------------------------------------------------
>
>                 Key: ARROW-3448
>                 URL: https://issues.apache.org/jira/browse/ARROW-3448
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Krisztian Szucs
>            Priority: Major
>             Fix For: 0.14.0
>
>
> Adding the following to the pandas_example.py::dataframe_with_lists functionn:
> {code:python}
> datetime_data = [
>      [datetime(2015, 1, 5, 12, 0, 0), datetime(2020, 8, 22, 10, 5, 0)],
>      [datetime(2024, 5, 5, 5, 49, 1), datetime(2015, 12, 24, 22, 10, 17)],
>      [datetime(1996, 4, 30, 2, 38, 11)],
>      None,
>      [datetime(1987, 1, 27, 8, 21, 59)]
> ]
> type = pa.timestamp('s'|'ms'|'us'|'ns')
> {code}
> breaks the tests cases, because the roundtrip doesn't preserve the object type.



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