py2neo包的安装
pip install py2neo连接到neo4j
from py2neo import Node, Graph, Relationship, NodeMatcher
link = Graph("http://localhost:7474", username="neo4j", password="neo4j")删除所有相关内容
link.delete_all()创建节点，边
node1 = Node("animal",name = 'cat')
node2 = Node("animal",name = 'dog')
node3 = Node("Person",name = 'Alice')
node4 = Node("Person",name = "nuocheng")
r1 = Relationship(node1,'know',node2)
r2 = Relationship(node2,'hos',node3)
r3 = Relationship(node4,'has',node2)
link.create(node1)
link.create(node2)
link.create(node3)
link.create(node4)
link.create(r1)
link.create(r2)
link.create(r3)查找节点
matcher = NodeMatcher(link)
matcher.match("Person").where("_.name='nuocheng'")Neo4J中增删改查
添加
添加节点
create(n:Person{name:"wo",age:31})n表示别名，person表示标签
create()
带有关系属性
create(p:Person{name:"wo",age:"31})-[:包工程{金额：10000}]->(n:Person{name:"好大哥",age:35})别名不能进行重复
—表示关系后面跟着[]，{}里面指定属性
create()-[]->()
删除
删除节点
match(n:Person{name:"wo"}) delete n删除关系
match (p:Person{name:"wo",age:"31})-[f:包工程]->(n:Person{name:"好大哥",age:35}) delete f删除关系，删除节点
match (p:Person{name:"wo",age:"31})-[f:包工程]->(n:Person{name:"好大哥",age:35}) delete f,n,p改
加标签
match (t:Person) where id(t)=344 set t:好人 return t添加属性
match(a:好人) where id(a)=344 set a.战斗力=200 return a修改属性（与添加属性一致）
match(a:好人) where id(a)=344 set a.战斗力=200 return a查操作
match (p:Person)-[:包工程] ->(n:Person) return p,n
