Amazon Neptune: How to create custom vertex id in Python using tinkerpop/gremlinpython package?

Question

As outlined here https://docs.aws.amazon.com/neptune/latest/userguide/access-graph-gremlin-differences.html custom vertex ids can only be set with the unquoted id property, i.e., g.addV('label1').property(id, 'customid'). How can one accomplish this using the gremlinpython package? I see an id function in gremlin_python.process.graph_traversal, but I get an UnsupportedOperationException (as expected) when attempting to use that.

Answer 1

You should just have to import T which is the class that hold the id and label members:

from gremlin_python.process.traversal import T

then use it as:

g.addV('label1').property(T.id, 'customid').iterate()

You can of course choose to import id from T so as to make the syntax synonymous with the example Gremlin in your question such that you may omit the T - some folks prefer that style.

It may be worth looking at the reference documentation for other common imports that Gremlin uses.