学习记录-py2neo:Neo4j数据库的python驱动

Posted 2020-12-19 L19

安装：

• 直接在命令行pip3 install py2neo
• 官网下载（解压后放到python下的scripts中，在py2neo目录下cmd，输入python setup.py install

链接

auth=(用户名,密码)

from py2neo import Graph,Node,Relationship
graph = Graph("http://localhost:7474",auth=("neo4j","password"))

• 问题：unauthorized(self.uri.string)

• 解决方法：

  from py2neo import authenticate,Graph
  authenticate("localhost:7474","账号","密码")
  graph = Graph("http://localhost:7474/db/data")
  

创建节点和关系

（已通过batch-import导入，这步省略

a = Node("Person", name="Alice")
b = Node("Person", name="Bob")
ab = Relationship(a, "KNOWS", b)
graph.create(ab)

查询

查询节点（使用原生查询语句

from py2neo import authenticate,Graph
graph = Graph("http://localhost:7474",auth=("neo4j","password"))

str = "match (变量名a:标签名{属性名:特定属性值}) return a"
x = graph.run(str).data()
y = pd.DataFrame(x)