[GitHub] [arrow] jorisvandenbossche commented on a change in pull request #10866: ARROW-3448: [Python] Pandas roundtrip doesn't preserve list of datetime objects

[GitBox <gi...@apache.org>]

jorisvandenbossche commented on a change in pull request #10866:
URL: https://github.com/apache/arrow/pull/10866#discussion_r682657996



##########
File path: python/pyarrow/tests/pandas_examples.py
##########
@@ -143,13 +143,27 @@ def dataframe_with_lists(include_index=False, parquet_compatible=False):
         None,
         [time(0, 0, 0), time(18, 0, 2), time(12, 7, 3)]
     ]
+    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)]
+    ]
+    pandas_timestamp_data = [
+        list(map(pd.Timestamp, x)) if x else None for x in datetime_data
+    ]
 
     temporal_pairs = [
         (pa.date32(), date_data),
         (pa.date64(), date_data),
         (pa.time32('s'), time_data),
         (pa.time32('ms'), time_data),
-        (pa.time64('us'), time_data)
+        (pa.time64('us'), time_data),
+        (pa.timestamp('s'), datetime_data),
+        (pa.timestamp('ms'), datetime_data),
+        (pa.timestamp('us'), datetime_data),
+        (pa.timestamp('ns'), pandas_timestamp_data),

Review comment:
       Do you get an error when you pass `datetime_data` here? (there are no nanoseconds here, so I would expect this to not matter)




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