bulbs | 易学教程

How to execute gremlin query with mogwai

阅读更多关于 How to execute gremlin query with mogwai

问题 Im trying to query a titan db 0.5.4 via mogwai, but when I run the following script i get the error: rexpro.exceptions.RexProScriptException: transaction is not open and I found the same question here P.S there is no tag for mogwai script: #!/usr/bin/env python3 from mogwai.connection import execute_query, setup con = setup('127.0.0.1', graph_name="bio4j", username="re", password="re") results = execute_query("2 * a",params={"a":2}, connection= con) print(results) results = execute_query(

Calling a gremlin script from python program that uses Bulbs

阅读更多关于 Calling a gremlin script from python program that uses Bulbs

问题 I am using TitanGraphDB + Cassandra.I am starting Titan as follows cd titan-cassandra-0.3.1 bin/titan.sh config/titan-server-rexster.xml config/titan-server-cassandra.properties I have a Rexster shell that I can use to communicate to Titan+Cassandra above. cd rexster-console-2.3.0 bin/rexster-console.sh I am attempting to model a network topology using Titan Graph DB.I want to program the Titan Graph DB from my python program.I am using bulbs package for that. I create three types of vertices

Calling a gremlin script from python program that uses Bulbs

阅读更多关于 Calling a gremlin script from python program that uses Bulbs

possible to connect to multiple neo4j databases via bulbs/Rexster?

阅读更多关于 possible to connect to multiple neo4j databases via bulbs/Rexster?

问题 I would like to be able to specify the neo4j (2.0+) database folder when I open a connection to a graph using bulbs. The goal is to be able to open different or multiple neo4j databases (folders in data/) on the same machine without starting the neo4j server. This works with the Gremlin console. I suspect the route to doing this with bulbs would be to use the bulbs Rexster client (http://bulbflow.com/docs/api/bulbs/rexster/client/) and somehow automatically start a Rexster server pointing to

Is there a equivalent to commit in bulbs framework for neo4j

阅读更多关于 Is there a equivalent to commit in bulbs framework for neo4j

问题 I am building a data-intensive Python application based on neo4j and for performance reasons I need to create/recover several nodes and relations during each transaction. Is there an equivalent of SQLAlchemy session.commit() statement in bulbs? Edit: for those interested, an interface to the Bulbs have been developped that implements that function natively and otherwise functions pretty much just like SQLAlchemy: https://github.com/chefjerome/graphalchemy 回答1: The most performant way to

Python and graph database. Use java lib wrapper or REST api?

阅读更多关于 Python and graph database. Use java lib wrapper or REST api?

问题 I want to ask you about the best way to use graph database (Neo4j) in Python. What you think, should I use "neo4j/python-embedded" (neo4j/python-embedded with JPype) or maybe "bulbflow" (bulbflow, with Rexster, Gremlin and REST api)? Is REST api secure and provides high availability (e.g. 500 000+ users)? Thank you. 回答1: I think Bulbs against Neo4j Server might be the best combination. Also, you can set up Neo4j in High Availability mode so multiple instances are forming a cluster, http:/

Selective indexing in bulbflow without using Models

阅读更多关于 Selective indexing in bulbflow without using Models

问题 I'm using bulbflow (python) with Neo4j and I'm trying to add an index only on a subset of my keys (for now, simply keys named 'name' for optional index-based lookup). I don't love the bulbflow Models (too restrictive) and I couldn't figure out how to do selective indexing without changing code since the 'autoindex' is a global setting -- I don't see how to configure it based on the key. Has anyone done something like this? -Andrew 回答1: You can disable Bulbs auto-indexing by setting g.config

Proper way to update Edges in Bulbs (neo4j or titan)

阅读更多关于 Proper way to update Edges in Bulbs (neo4j or titan)

问题 I'm experimenting with Bulbs to interface with a graph database. ( Production will use Titan, locally Neo4j seems best for experimenting ). I can't wrap my head around this concept... Bulbs shows how to create new Vertices... >>> james = g.vertices.create(name="James") >>> julie = g.vertices.create(name="Julie") >>> g.edges.create(james, "knows", julie) Digging into the docs, I can replace that with a "get or create" as well : >>> james = g.vertices.get_or_create('name',"James",{'name':'james

Proper way to update Edges in Bulbs (neo4j or titan)

阅读更多关于 Proper way to update Edges in Bulbs (neo4j or titan)

I'm experimenting with Bulbs to interface with a graph database. ( Production will use Titan, locally Neo4j seems best for experimenting ). I can't wrap my head around this concept... Bulbs shows how to create new Vertices... >>> james = g.vertices.create(name="James") >>> julie = g.vertices.create(name="Julie") >>> g.edges.create(james, "knows", julie) Digging into the docs, I can replace that with a "get or create" as well : >>> james = g.vertices.get_or_create('name',"James",{'name':'james') What I can't figure out, is how to get an existing Edge. My attempts so far have ended up with

Bulbflow: difference between neo4jserver Graph and neo4jserver Neo4jclient

阅读更多关于 Bulbflow: difference between neo4jserver Graph and neo4jserver Neo4jclient

问题 I am now trying to learn how to connect to Neo4j server and run Cypher queries on it using Bulbflow from Python. And the thing I do not understand is the difference between two possibilities to connect to the neo4j server: 1) Graph from bulbs.neo4jserver import Graph g = Graph() 2) Neo4jClient from bulbs.neo4jserver import Neo4jClient client = Neo4jClient() Could anyone please explain the conceptual difference here? And which way is it better to choose if I then want to execute (quite a lot