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https://issues.apache.org/jira/browse/BEAM-12379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17363282#comment-17363282
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Brian Hulette commented on BEAM-12379:
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[applymap|https://github.com/apache/beam/blob/c0b8e6531f6ade6a9c9e50222542e041954ba911/sdks/python/apache_beam/dataframe/frames_test.py#L652]
requires type inference on the user function
> Some DataFrame operations yield incorrect proxies
> -------------------------------------------------
>
> Key: BEAM-12379
> URL: https://issues.apache.org/jira/browse/BEAM-12379
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Brian Hulette
> Assignee: Brian Hulette
> Priority: P2
> Labels: dataframe-api
> Time Spent: 5h
> Remaining Estimate: 0h
>
> There are some operations that yield proxies which do not match the data they
> produce at runtime. We should add tests that verify proxies match, and fix
> the operations where they dont.
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