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https://issues.apache.org/jira/browse/THRIFT-1528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13627056#comment-13627056
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Nate Rosenblum commented on THRIFT-1528:
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I've moved the Java and C# patches to the respective subtasks. To the best of
my knowledge, I believe that Python already behaves like C++, so it does not
need to be patched. That's what I read from the initial issue, anyway. Somebody
else can chime in.
> Inconsistency in optional fields between Java/C# and python
> -----------------------------------------------------------
>
> Key: THRIFT-1528
> URL: https://issues.apache.org/jira/browse/THRIFT-1528
> Project: Thrift
> Issue Type: Bug
> Components: Python - Compiler
> Affects Versions: 0.8
> Reporter: Stefan Gmeiner
> Priority: Minor
>
> If a struct contains optional fields with default values the generated python
> code serialize differently than Java or C# code.
> In Java or C# optional fields are only serialized if a field was set by the
> client. If not the field is omited during serialization. This is possible
> because C#/Java maintains for each field a 'isset'-boolean which records if a
> field was set or not.
> However the generated python code does not have such a 'isset'-structure. It
> writes every field which is not equal None. As the constructor initialize the
> optional fields with their default value, these fields are written whether
> they are set or not.
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