Setting up Neo4J

Implementation of Neo4j (Individual)

Install neo4j python driver

pip install neo4j

Import neo4j to current environment

from neo4j import GraphDatabase

Create a python driver

driver = GraphDatabase.driver(uri = "bolt://localhost:7687",\
                      auth = ("user","password"))

Clean the graph database, if using with pre-existing data

with driver.session() as session:
        session.run("MATCH (a) DETACH DELETE a")

Create nodes in the graph

for item in Data:
    with driver.session() as session:
        session.run("MERGE(a:Disease{ID: $ID}) "
                        "ON CREATE SET a.code = $code, \
                        a.title = $title, a.defn = $defn,\
                        a.syns = $syns, a.childs = $childs,\
                        a.parents = $parents",
            ID=item['id'], code=item['code'], title=item['title'],\
            defn=item['defn'], syns=item['syns'], childs=item['childs'],\
            parents=item['parents'])

Create edge with relationship "parents"

with driver.session() as session:
    session.run("MATCH (a:Disease),(b:Disease) "
            "WHERE a.ID in b.parents "
            "MERGE (a)<-[r:Parent]-(b)")

Create edge with relationship "children"

with driver.session() as session:
    session.run("MATCH (a:Disease),(b:Disease) "
            "WHERE a.ID in b.childs "
            "MERGE (a)<-[r:Child]-(b)")