HyukjinKwon commented on issue #24997: [SPARK-28198][PYTHON] Add mapPartitionsInPandas to allow an iterator of DataFrames URL: https://github.com/apache/spark/pull/24997#issuecomment-507486678 There are other possibilities for other iterator versions of pandas UDFs like `GROUPED_MAP`, `GROUPED_AGG`, `GROUPED_AGG` with Window function which was already asked at [here](https://issues.apache.org/jira/browse/SPARK-26412?focusedCommentId=16867954&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16867954). I am not sure if we need to add every version of iterator or if we should keep the current API shape (adding every `_ITER` type of pandas evaluation code). Since code freeze is being close, I am going to merge this and rename it quickly. I think we should revisit how we want to handle this after the release ..
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