Hello,
Okay, so I got into a groove. Here is Python->Gremlin-Groovy(String). This is
pure Python -- nothing Jython going on here.
https://gist.github.com/okram/4705fed038dde673f4c5323416899992
Here it is in action:
# create a traversal source (stupid class name, I know)
>>> g = PythonStringGraphTraversalSource("g")
# simple warmup
>>> g.V().has("name","marko")
g.V().has("name", "marko")
# one has()-method, but varargs parsing is smart
>>> g.V().has("person","name","marko")
g.V().has("person", "name", "marko")
# strings and numbers mixed
>>> g.V().has("person","age",32)
g.V().has("person", "age", 32)
# nested anonymous traversal
>>> g.V().where(out("knows"))
g.V().where(__.out("knows"))
# as() is reserved in Python, so _as() is used.
>>> g.V()._as("a").out("created")._as("b").where(_as("a").out("knows"))
g.V().as("a").out("created").as("b").where(__.as("a").out("knows"))
# multi-traversal match()
>>> g.V().match(_as("a").out("knows")._as("b"), _as("b").out("knows")._as("a"))
g.V().match(__.as("a").out("knows").as("b"), __.as("b").out("knows").as("a"))
# P-predicates and .name-sugar (attribute access interception)
>>> g.V().hasLabel("person").has("age",gt(30)).out("created","knows").name
g.V().hasLabel("person").has("age", P.gt(30)).out("created",
"knows").values("name")
# smart about boolean conversion
>>> g.V().valueMap(True,"name","age")
g.V().valueMap(true, "name", "age")
# lambdas -- ghetto as its not a Python lambda, but a Groovy lambda string
>>> g.V().map('it.get().value("name")')
g.V().map(it.get().value("name"))
What other constructs are there? I think thats it… Everything else from here is
just fat fingering in all the methods. Then, from there you use David Brown's
GremlinClient (https://github.com/davebshow/gremlinclient) to shuffle the
string across the network to GremlinServer and get back results. I suppose
there needs to be some sort of .submit() method ? …. hmmm… wondering if
.next()/hasNext() iterator methods can be used to submit automagically and then
it feels JUST like Gremlin-Java.
@Mark: This is what Gremlinpy should do, no?
@Dylan: Can you find any Gremlin syntax hole I'm missing that isn't solvable
with the current espoused pattern?
Good, right?
Marko.
http://markorodriguez.com
On Apr 19, 2016, at 4:51 PM, Marko Rodriguez <[email protected]> wrote:
> Hi,
>
> Done for the night. Here is PythonStringGraphTraversal.
>
> https://gist.github.com/okram/4705fed038dde673f4c5323416899992
>
> ??? Cool?
>
> Marko.
>
> http://markorodriguez.com
>
> On Apr 19, 2016, at 4:28 PM, Marko Rodriguez <[email protected]> wrote:
>
>> 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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>>>>>> To view this discussion on the web visit
>>>>>> https://groups.google.com/d/msgid/gremlin-users/18A7D2FD-B9B1-4DC9-980B-66A6A8F9C7C8%40gmail.com.
>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>
>>>>>>
>>>>>> --
>>>>>> You received this message because you are subscribed to the Google
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>>>>>> To view this discussion on the web visit
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>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>
>>>>
>>>
>>
>
