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https://issues.apache.org/jira/browse/BEAM-1865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15963584#comment-15963584
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ASF GitHub Bot commented on BEAM-1865:
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Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/2470
> Input Coder of GroupByKey should be a KV Coder in the Python SDK
> ----------------------------------------------------------------
>
> Key: BEAM-1865
> URL: https://issues.apache.org/jira/browse/BEAM-1865
> Project: Beam
> Issue Type: Bug
> Components: sdk-py
> Reporter: Vikas Kedigehalli
> Assignee: Vikas Kedigehalli
>
> `Any` type is consistent with `KV` in python. The coder for `Any` type is a
> fallback coder or a `FastPrimitivesCoder`, but for a `GroupByKey` operation
> this needs to be a `TupleCoder` to ensure that the generated pipeline
> representation is runnable on a runner in a different language (in the Fn API
> world)
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