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


Krisztian Szucs created ARROW-3448:
--------------------------------------

             Summary: [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


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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