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.
|1.||Java: Inconsistency in serialization of optional fields||Open||Unassigned|