I've been trying to figure out why the GLV test suite won't pass for gremlin-python in GraphSON 3.0 on this issue:
https://issues.apache.org/jira/browse/TINKERPOP-1844 The answer turns out to be related to the g:Set. Numbers of mixed types returned from a Set in java aren't recognized as distinct in a python Set, thus a Set in java of: [1, 1.0, 2, 2.0] would be seen in python as: [1,2] The only answer (it seems) is to convert g:Set in python to a List. Then users will have to manually convert their List to a Set if they deem in necessary. I think that this approach makes the most sense as python users likely wouldn't expect their sets to behave like java sets with the weird numeric equality stuff. Obviously, making this change would be a breaking change for python users. I think it's sensible to make this change however on tp32/master as imo this is a bug that prevents results from being the same in python as they are in Java. Note that other than a single unit test assertion that was ensuring that g:Set was deserializing to Set, all tests passed including all the GLV tests. I've prepared a PR here: https://github.com/apache/tinkerpop/pull/769 I'll let it sit at least 72 hours in review before merging even if the votes come in early, in case anyone has any objections.