gremlin in python NameError not recognising functions

Question

I am running Gremlin-Pyton in a Jupyter notebook and for some reason the following does not work:

g.V().group().by().by(bothE().count())

I keep getting the error:

NameError: name 'bothE' is not defined

Answer 1

If you followed the typical imports listed in the documentation:

>>> from gremlin_python import statics
>>> 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

then bothE is available as __.bothE.

The methods in the __ namespace can be added to your notebook globals with:

>>> statics.load_statics(globals())

so you can access bothE directly without a prefix.

Quoting from the documentation:

Moreover, by importing the statics of Gremlin-Python, the class prefixes can be omitted.

>>> statics.load_statics(globals())

and

Finally, statics includes all the -methods and thus, anonymous traversals like .out() can be expressed as below. That is, without the __.-prefix.

>>> g.V().repeat(out()).times(2).name.fold().toList()
[[ripple, lop]]

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Caveat: I am not a Gremlin-Python user nor is it practical for me to install Gremlin to verify the above completely. I based this on reading the documentation and a scan of the project source code.