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python中使用neo4j

news 来源：原创 2025/5/16 9:42:12

参考上片问文档，除了在控制台输入查询外，还可在python中执行查询命令

1.find单个节点。查询tom信息

from py2neo import Graphgraph = Graph('bolt://xx.xx.xx.xx:7687',auth=("neo4j","neo4j1234"))
print ("数据库连接正常")result = graph.run("match (tom {name:'Tom Hanks'}) return tom")for record in result:person_node = record["tom"]print(person_node)

2.以节点中的某个属性去查询

修改了下脚本，将url等登录信息放进配置文件中。

import configparser
from py2neo import Graphconfig = configparser.ConfigParser()
config.read('config.ini')#获取数据库连接
neo4j_config = config['neo4j']
neo4j_url = neo4j_config['neo4jUrl']
neo4j_name = neo4j_config['neo4jName']
neo4j_passwd = neo4j_config['neo4jPasswd']graph = Graph(neo4j_url,auth=(neo4j_name,neo4j_passwd))
print ("数据库连接正常")result = graph.run("match (cloudAtlas {title:'Cloud Atlas'}) return cloudAtlas").data()for record in result:person_node = record["cloudAtlas"]print(person_node)

3.查询指定个数的信息

import configparser
from py2neo import Graphconfig = configparser.ConfigParser()
config.read('config.ini')#获取数据库连接
neo4j_config = config['neo4j']
neo4j_url = neo4j_config['neo4jUrl']
neo4j_name = neo4j_config['neo4jName']
neo4j_passwd = neo4j_config['neo4jPasswd']graph = Graph(neo4j_url,auth=(neo4j_name,neo4j_passwd))
print ("数据库连接正常")result = graph.run("match (cloudAtlas:Person) return cloudAtlas limit 10")for record in result:person_node = record["cloudAtlas"]print(person_node)

4.条件查询

import configparser
from py2neo import Graphconfig = configparser.ConfigParser()
config.read('config.ini')#获取数据库连接
neo4j_config = config['neo4j']
neo4j_url = neo4j_config['neo4jUrl']
neo4j_name = neo4j_config['neo4jName']
neo4j_passwd = neo4j_config['neo4jPasswd']graph = Graph(neo4j_url,auth=(neo4j_name,neo4j_passwd))
print ("数据库连接正常")result = graph.run("match (nineties:Movie) where nineties.released >= 1990 and nineties.released < 2000 return nineties.title limit 5")for record in result:person_node = record["nineties.title"]print(person_node)

5.查询出tom出演的电影名称

import configparser
from py2neo import Graphconfig = configparser.ConfigParser()
config.read('config.ini')#获取数据库连接
neo4j_config = config['neo4j']
neo4j_url = neo4j_config['neo4jUrl']
neo4j_name = neo4j_config['neo4jName']
neo4j_passwd = neo4j_config['neo4jPasswd']graph = Graph(neo4j_url,auth=(neo4j_name,neo4j_passwd))
print ("数据库连接正常")
query="match (tom:Person{ name:'Tom Hanks'})-[:ACTED_IN]->(tomHanksMovies) return tom, tomHanksMovies"
result = graph.run(query)for record in result:name = record["tom"]movies = record["tomHanksMovies"]print(name, movies)