知识图谱新购活动

from neo4j import GraphDatabase

# 连接到Neo4j数据库
uri = "bolt://localhost:7687"
user = "neo4j"
password = "password"
driver = GraphDatabase.driver(uri, auth=(user, password))

# 定义一个创建节点和关系的函数
def create_person_and_friends(tx, name, friends):
    tx.run("CREATE (a:Person {name: $name})", name=name)
    for friend in friends:
        tx.run("""
            MATCH (a:Person {name: $name1}), (b:Person {name: $name2})
            CREATE (a)-[:FRIEND]->(b)
        """, name1=name, name2=friend)

# 执行创建操作
with driver.session() as session:
    session.write_transaction(create_person_and_friends, "Alice", ["Bob", "Charlie"])

# 查询图谱
def find_persons_friends(tx, name):
    result = tx.run("""
        MATCH (a:Person {name: $name})-[:FRIEND]->(friend)
        RETURN friend.name AS friend
    """, name=name)
    return [record["friend"] for record in result]

with driver.session() as session:
    friends = session.read_transaction(find_persons_friends, "Alice")
    print(f"Alice's friends: {friends}")

driver.close()