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https://issues.apache.org/jira/browse/AVRO-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14256331#comment-14256331
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Sergei Kuzmin commented on AVRO-1618:
-------------------------------------

I've added the proposed patch to related issue  AVRO-1291. It introduces 
argument in DatumReader/Writer which selects the de-/serialization schema: 
flat(current), rest.li Pegasus, and strict avro JSON.

> Allow user to "clean up" unions into more conventional dicts in json encoding
> -----------------------------------------------------------------------------
>
>                 Key: AVRO-1618
>                 URL: https://issues.apache.org/jira/browse/AVRO-1618
>             Project: Avro
>          Issue Type: Improvement
>          Components: python
>    Affects Versions: 1.7.7
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: avro-1618.1.patch
>
>
> In Avro's JSON encoding, unions are implemented in a tagged fashion; walking 
> through this data structure is somewhat cumbersome. It would be good to have 
> a way of "decoding" this tagged-union data structure into a more conventional 
> dict where the union element is directly present without the tag.



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