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Posted to github@arrow.apache.org by "AlenkaF (via GitHub)" <gi...@apache.org> on 2025/03/03 13:25:36 UTC

Re: [I] [Python] - Schema inference from pandas reorders struct fields [arrow]

AlenkaF commented on issue #45640:
URL: https://github.com/apache/arrow/issues/45640#issuecomment-2694382998

   Yes, looking at the linked issue and the comment from Joris, I would suspect that the fields in the struct created from pandas struct column are sorted "due to the fact that we use a `std::map` in C++" which might be found here https://github.com/apache/arrow/blob/0fbf9823542233c5f32c26534c34cc97ce3f0be2/python/pyarrow/src/arrow/python/inference.cc#L702
   We should better document that.
   
   I suggest to keep the linked (https://github.com/apache/arrow/issues/34250) issue open and close this one. It would be worth adding additional information from linked issue to the docs also.


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