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[Python-Dev] Is XML serialization output guaranteed to be bytewise identical forever?

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Hi Raymond,As long as the new serialization order is deterministic (i.e. it's thesame every run and doesn't depend on e.g. hash randomization), then Ithink it's fine to change it.Some more comments / questions:> 2). Go into every XML module and add attribute sorting options to each function that generate xml.What do you mean with "every XML module"? Are there many of them?> Regardless of option chosen, we should make explicit whether on not the Python standard library modules guarantee cross-release bytewise identical output for XML.IMO we certainly shouldn't.  XML is a serialization format used formachine interoperability (even though "human-editable" was one of itsselling points at the start, rather misguidingly).  However, the outputshould ideally be stable and deterministic accross all releases of agiven bugfix branch.(i.e., if I run the same code multiple times on all 3.7.x versions, Ishould get always the same output)RegardsAntoine.

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