Gremlinpython: NameError: name 'otherV' is not defined

[ken.gri...@gmail.com]

Hi,I was trying to find an edge through two vertices.

when i use groovy-gremlin,it's work:

gremlin> g.V().has("bulkLoader.vertex.id",1).bothE().where(otherV().has("bulkLoader.vertex.id",2))

==>e[5j7-cns-2dx-ftk][16408-call->20504]

but when i use gremlinpython,it doesn't work:

from gremlin_python.structure.graph import Graph
from gremlin_python.process.graph_traversal import __
from gremlin_python.process.strategies import *
from gremlin_python.driver.driver_remote_connection import DriverRemoteConnection
from gremlin_python.process.traversal import *

#pprint.pprint(g.V().has("bulkLoader.vertex.id",'1').bothE().otherV().toList())
pprint.pprint(g.V().has("bulkLoader.vertex.id",'1').bothE().where(otherV().has("bulkLoader.vertex.id",'2')))

Traceback (most recent call last):
  File "/home/shenqiqing/graphdb/janusgraph-0.2.0-hadoop2/py/test_gremlin.py", line 40, in <module>
    pprint.pprint(g.V().has("bulkLoader.vertex.id",'1').bothE().where(otherV().has("bulkLoader.vertex.id",'2')))
NameError: name 'otherV' is not defined

 it's confused me..

[Stephen Mallette]

otherV() is an anonymous traversal:

http://tinkerpop.apache.org/docs/3.3.3/tutorials/gremlins-anatomy/#_anonymous_traversals

it is spawned from the double underscore class so either reference it directly:

g.V().has("bulkLoader.vertex.id",'1').bothE().where(__.otherV().has("bulkLoader.vertex.id",'2'))

or establish it as a function:

otherV = __.otherV

g.V().has("bulkLoader.vertex.id",'1').bothE().where(otherV().has("bulkLoader.vertex.id",'2'))

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[ken.gri...@gmail.com]

thanks for your reply ;) It works.

在 2018年5月16日星期三 UTC+8上午1:46:17，Stephen Mallette写道：

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