Hi,
So I "learned" Python and am able to do a Python class wrapper around
GraphTraversal.
https://gist.github.com/okram/1a0c5f6b65a4b70c558537e5eeaad429
Its crazy, it "just works" -- with __ static methods and all.
The reason I wanted to create a wrapper is because I want to use
Python-specific language constructs and not only Gremlin-Java. What those
specific language constructs are, I don't know as I don't know Python :).
Moreover, this shell of a wrapper will be used for the JNI and String
construction models. Right?
>>> g = PythonGraphTraversalSource(graph)
>>> g
graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
>>> g.V()
[GraphStep(vertex,[])]
>>> g.V().toList()
[v[1], v[2], v[3], v[4], v[5], v[6]]
>>> g.V().where(__.out("created")).values("name").toList()
[marko, josh, peter]
>>>
Even valueMap() which takes var args of different types works.
>>> g.V().valueMap()
[GraphStep(vertex,[]), PropertyMapStep(value)]
>>> g.V().valueMap().toList()
[{name=[marko], age=[29]}, {name=[vadas], age=[27]}, {name=[lop], lang=[java]},
{name=[josh], age=[32]}, {name=[ripple], lang=[java]}, {name=[peter], age=[35]}]
>>> g.V().valueMap("name").toList()
[{name=[marko]}, {name=[vadas]}, {name=[lop]}, {name=[josh]}, {name=[ripple]},
{name=[peter]}]
>>> g.V().valueMap(True,"name").toList()
[{label=person, name=[marko], id=1}, {label=person, name=[vadas], id=2},
{label=software, name=[lop], id=3}, {label=person, name=[josh], id=4},
{label=software, name=[ripple], id=5}, {label=person, name=[peter], id=6}]
>>>
Easy peasy lemon squeezy or is there something fundamental I'm missing?
Marko.
http://markorodriguez.com
On Apr 19, 2016, at 2:58 PM, Marko Rodriguez <[email protected]> wrote:
> Hi,
>
> So I downloaded and installed Jython 2.7.0.
>
> This how easy it was to get Gremlin working in Jython.
>
> import sys
> sys.path.append("/Users/marko/software/tinkerpop/tinkerpop3/gremlin-console/target/apache-gremlin-console-3.2.1-SNAPSHOT-standalone/lib/commons-codec-1.9.jar")
> sys.path.append("/Users/marko/software/tinkerpop/tinkerpop3/gremlin-console/target/apache-gremlin-console-3.2.1-SNAPSHOT-standalone/lib/commons-configuration-1.10.jar")
> … lots of jars to add
> sys.path.append("/Users/marko/software/tinkerpop/tinkerpop3/gremlin-console/target/apache-gremlin-console-3.2.1-SNAPSHOT-standalone/ext/tinkergraph-gremlin/lib/tinkergraph-gremlin-3.2.1-SNAPSHOT.jar")
>
> from org.apache.tinkerpop.gremlin.tinkergraph.structure import TinkerFactory
> graph = TinkerFactory.createModern()
> g = graph.traversal()
> g
> g.V().hasLabel("person").out("knows").out("created")
> g.V().hasLabel("person").out("knows").out("created").toList()
>
> Then, the output looks like this:
>
> >>> from org.apache.tinkerpop.gremlin.tinkergraph.structure import
> >>> TinkerFactory
> >>> graph = TinkerFactory.createModern()
> >>> g = graph.traversal()
> >>> g
> graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
> >>> g.V().hasLabel("person").out("knows").out("created")
> [GraphStep(vertex,[]), HasStep([~label.eq(person)]),
> VertexStep(OUT,[knows],vertex), VertexStep(OUT,[created],vertex)]
> >>> g.V().hasLabel("person").out("knows").out("created").toList()
> [v[5], v[3]]
>
> Note that, of course, Jython's command line doesn't auto-iterate traversals.
> Besides that -- sheez, that was simple.
>
> The trick now is to use Jython idioms to make Gremlin-Jython be comfortable
> to Python users…
>
> Marko.
>
> http://markorodriguez.com
>
> On Apr 19, 2016, at 11:43 AM, Marko Rodriguez <[email protected]> wrote:
>
>> Hi,
>>
>> So I just pushed:
>>
>> https://git1-us-west.apache.org/repos/asf?p=incubator-tinkerpop.git;a=commitdiff;h=0beae616
>>
>> This should help provide the scaffolding for the tutorial. Given that I know
>> nothing about Python, I think my contributions start to fall off
>> significantly here. :) … Well, I can help and write more text, I just don't
>> know how to use Jython, Python idioms, Gremlinpy, etc…..
>>
>> @Mark/Dylan: If you want to build the tutorial and look at it, you simple do:
>>
>> $ bin/process-docs.sh --dryRun
>>
>> And then for me, the URI to which I point my browser for the index.html on
>> my local computer is:
>>
>>
>> file:///Users/marko/software/tinkerpop/tinkerpop3/target/docs/htmlsingle/tutorials/gremlin-language-variants/index.html
>>
>> Marko.
>>
>> http://markorodriguez.com
>>
>> On Apr 19, 2016, at 9:16 AM, Marko Rodriguez <[email protected]> wrote:
>>
>>> Hello (NOTE: I dropped gremlin-users@),
>>>
>>> Thank you Stephen. Its crazy how simple that is :D.
>>> https://twitter.com/apachetinkerpop/status/722432843360546816
>>>
>>> So Mark, now your fork's TINKERPOP-1232/ branch and
>>> https://github.com/apache/incubator-tinkerpop/tree/TINKERPOP-1232 exist and
>>> we can keep them sync'd accordingly as we develop this tutorial. When we
>>> feel that the tutorial is ready for primetime, we will issue a PR to have
>>> it merged into tp31/ (and thus, up merged to master/).
>>>
>>> Where do we go from here? I think this is a good opportunity to work both
>>> on Gremlinpy and the tutorial. Can we make Gremlinpy as true to the spirit
>>> of "host language embedding" as possible? In doing so, can we explain how
>>> we did it so other language providers can learn the best practices?
>>>
>>> In the tutorial we have 3 models we want to promote:
>>>
>>> 1. Jython
>>> 2. Python JINI
>>> 3. Python String
>>>
>>> (1) is easy to knock off. In fact, we should ask Michael Pollmeier for
>>> advice here given his work on Gremlin-Scala. (2) -- ?? do you know how do
>>> this? If so, it should be only fairly more difficult than (1). Finally, (3)
>>> is the big win and where I think most of the work both in the tutorial and
>>> in Gremlinpy will happen.
>>>
>>> How do you propose we proceed?
>>>
>>> Thank you,
>>> Marko.
>>>
>>> http://markorodriguez.com
>>>
>>> On Apr 19, 2016, at 8:24 AM, Stephen Mallette <[email protected]> wrote:
>>>
>>>> ok - done:
>>>> https://github.com/apache/incubator-tinkerpop/tree/TINKERPOP-1232
>>>>
>>>> On Tue, Apr 19, 2016 at 9:41 AM, Marko Rodriguez <[email protected]>
>>>> wrote:
>>>> Hello,
>>>>
>>>> *** Mark, if you are not on dev@tinkerpop, I would recommend joining that
>>>> as I will drop gremlin-users@ from communication on this ticket from here
>>>> on out. ***
>>>>
>>>> @Stephen: Mark forked the TinkerPop repository to his GitHub account. I
>>>> believe he gave you access as well as me.
>>>>
>>>> Can you create a new stub tutorial for Mark+Dylan+me? (Moving forward, I
>>>> will learn how to do it from your one commit).
>>>>
>>>> gremlin-language-variants/
>>>>
>>>> After that Mark+Dylan+me will go to town on:
>>>> https://issues.apache.org/jira/browse/TINKERPOP-1232
>>>>
>>>> Thank you,
>>>> Marko.
>>>>
>>>> http://markorodriguez.com
>>>>
>>>> Begin forwarded message:
>>>>
>>>>> From: Mark Henderson <[email protected]>
>>>>> Subject: emehrkay added you to incubator-tinkerpop
>>>>> Date: April 15, 2016 10:04:54 AM MDT
>>>>> To: "Marko A. Rodriguez" <[email protected]>
>>>>>
>>>>> You can now push to this repository.
>>>>>
>>>>> ---
>>>>> View it on GitHub:
>>>>> https://github.com/emehrkay/incubator-tinkerpop
>>>>
>>>>
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>>>
>>
>
