库引入

from py2neo import Graph, Node, Relationship, NodeSelector

绑定数据库

# ip_host 为数据库地址，passwrd为neo4j密码
graph = Graph(ip_host, password=NEO4J_PWD)

创建节点

# Label为节点标签，properties 为标签属性
node = Node(Label,property)
graph.Create(node)

根据节点标签以及属性寻找到该节点的所有信息

# Label 标签 property索引属性 value 属性的值
r_node = graph.Graph.find_one(Label,property,value)

节点之间增加关系

# 将node与r_node之间建立名为relationship的关系
node_r_node = Relationship(node,relationship,r_node)
graph.Graph.create(node_r_node)

删除节点

        # 删除所有节点
        if pattern == "all":
            self.graph.delete_all()
        elif pattern == "n":#删除n为label的节点
            self.graph.run("MATCH(n:" + label + ") DETACH DELETE n")
        elif pattern == "r":#删除r为label的节点
            self.graph.run("MATCH (n)-[r:" + label + "]-(m) DETACH DELETE r")
        elif pattern == "nr":#删除nr为label的节点
            self.graph.run("MATCH (n)<-[r:" + label + "]-(m) DETACH DELETE r, n")
        elif pattern == "rm":#删除rm为label的节点
            self.graph.run("MATCH (n)-[r:" + label + "]->(m) DETACH DELETE r, m")
        elif pattern == "nrm":#删除nrm为label的节点
            self.graph.run("MATCH (n)-[r:" + label + "]-(m) DETACH DELETE r, n, m")