python创建neo4j节点及节点之间的关系
（连接）打开neo4j本地服务器，python连接。
python连接代码
username = ***
password = *** （自己设置的neo4j的密码）
graph = Graph('http://localhost:7474',username=username,password=password)
（数据加载）需要创建的节点及其关系
为了简单演示：我是简单的创建了几个节点及关系。大家可自行更改。
这里演示的数据如下：
重点（neo4j与python代码演示）
①创建节点函数
②查询节点函数
③节点之间创建关系函数
④加载进neo4j图库
⑤neo4j图库结果展示
完整代码
下面展示一些 内联代码片。
import pandas as pd
from py2neo import Node,Relationship,Graph,NodeMatcher,RelationshipMatcher
# 创建节点
def CreateNode(m_graph,m_label,m_attrs):
m_n="_.name="+"\'"+m_attrs['name']+"\'"
matcher = NodeMatcher(m_graph)
re_value = matcher.match(m_label).where(m_n).first()
print(re_value)
if re_value is None:
m_mode = Node(m_label,**m_attrs)
n = graph.create(m_mode)
return n
return None
# 查询节点
def MatchNode(m_graph,m_label,m_attrs):
m_n="_.name="+"\'"+m_attrs['name']+"\'"
matcher = NodeMatcher(m_graph)
re_value = matcher.match(m_label).where(m_n).first()
return re_value
# 创建关系
def CreateRelationship(m_graph,m_label1,m_attrs1,m_label2,m_attrs2,m_r_name):
reValue1 = MatchNode(m_graph,m_label1,m_attrs1)
reValue2 = MatchNode(m_graph,m_label2,m_attrs2)
if reValue1 is None or reValue2 is None:
return False
m_r = Relationship(reValue1,m_r_name,reValue2)
n = graph.create(m_r)
return n
graph = Graph('http://localhost:7474',username='neo4j',password='yangZAI520')
Names = ["老师","超市","程序员","小卖部","阳仔公司"]
action = ["传授","销售","敲","售卖","提供"]
things = ["知识","日常用品","代码","日常用品","餐饮服务"]
data = pd.DataFrame({"名称":Names,"字段":things,"方式":action})
data
username = ***
password = *** （自己设置的neo4j的密码）
graph = Graph('http://localhost:7474',username=username,password=password)
label1 = "Name"
label2 = "things"
for i,j in data.iterrows():
# 名称
attr1 = { "name":j.名称}
CreateNode(graph,label1,attr1)
# 产品
attr2 = { "name":j.字段}
CreateNode(graph,label2,attr2)
m_r_name = j.方式
reValue = CreateRelationship(graph,label1,attr1,label2,attr2,m_r_name)
print(reValue)
