Python 操作 Neo4j

1.neo4j模块：执行CQL ( cypher ) 语句

from neo4j import GraphDatabase


driver = GraphDatabase.driver("bolt://localhost:7687",auth=("root","root"))

def add_point(tx,name):
    tx.run("CREATE (A:Person{name:$name}) "
           , name=name)


def add_friend(tx,name,friend_name):
    tx.run("MERGE (A:Person{name:$name}) "
           "-[:KNOWS]->(friend:Person{name:$friend_name})",name=name,friend_name=friend_name)


def print_friends(tx, name):
    for record in tx.run("MATCH (a:Person)-[:KNOWS]->(friend) WHERE a.name = $name "
                         "RETURN friend.name ORDER BY friend.name", name=name):
        print(record["friend.name"])


with driver.session() as session:
    # session.write_transaction(add_point, "Arthur")
    # session.write_transaction(add_point, "Guinevere")
    # session.write_transaction(add_point, "Lancelot")
    # session.write_transaction(add_point, "Merlin")
    session.write_transaction(add_friend,"Arthur","Guinevere")
    session.write_transaction(add_friend, "Arthur", "Lancelot")
    session.write_transaction(add_friend, "Arthur", "Merlin")
    session.read_transaction(print_friends, "Arthur")

2.py2neo模块：通过操作python变量，达到操作neo4j的目的

from py2neo import Node,Graph,Relationship,NodeMatch

#构建图
g = Graph()
g.delete_all()

#添加节点
a = Node("Person",name = "Alice")
g.create(a)

#添加节点
b = Node("Person",name = "Bob")
g.create(b)

#添加联系，边
ab = Relationship(a,"KNOWS",b)
g.create(ab)