[ARROW-15018] [Python] DataFrame Index modified during Feather serialization round trip

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.0.0, 6.0.1
• Fix Version/s: 8.0.0
• Component/s: Python
• External issue URL: https://github.com/apache/arrow/issues/30536
• Assignee: Unassigned
• Reporter: Mike
• Created: 08/Dec/21 00:51
• Updated: 11/Jan/23 08:43
• Resolved: 05/May/22 15:47

Description

Some (or all) indexes are converted to a RangeIndex after a Feather serialization/deserialization round trip. I came across this in pyarrow 3.0.0 and 6.0.1 for both a MultiIndex and an empty dataframe (Dataframe.index -> RangeIndex).

 

Desired behavior: A dataframe with any type of index would be supported and a serialization/deserialization round trip would preserve the index and yield an identical dataframe

 

Please feel free to modify priority and issue type as appropriate, thanks!

Issue Links

• is duplicated by: ARROW-7914 [Python] Allow pandas datetime as index for feather