Noticed that between the java and python implementations, the graphson2.0 payload generated for a has step is different. i.e. for the given traversal:
The java implementation produces the following graphson:
where the python implementation produces the following:
In the java case, a g:P typed (predicate) value is provided, where in the python case that isn't the case.
I'm assuming the java one is correct (primarily since the graph backend seems to like it and return the expected result). Should GLV implementations behave this way? I noticed that GraphTraversal#has(String propertyKey, Object value) in the java TinkerPop api wraps the value in a predicate (P.eq) under the covers (link) so maybe implementors will need to do the same (python link)?