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https://issues.apache.org/jira/browse/BEAM-12131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17549307#comment-17549307
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Danny McCormick commented on BEAM-12131:
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This issue has been migrated to https://github.com/apache/beam/issues/20911

> DataFrame API: Integrate pandas windowing with Beam event-time semantics
> ------------------------------------------------------------------------
>
>                 Key: BEAM-12131
>                 URL: https://issues.apache.org/jira/browse/BEAM-12131
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-dataframe, sdk-py-core
>            Reporter: Brian Hulette
>            Priority: P3
>              Labels: dataframe-api
>
> pandas has support for 
> [rolling()|https://pandas.pydata.org/pandas-docs/stable/user_guide/window.html]
>  windows. It should be possible to use this within a DataframeTransform and 
> have it apply Beam windowing.



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