图数据新年活动

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))

def create_person(tx, name):
    tx.run("CREATE (a:Person {name: $name})", name=name)

def create_friendship(tx, name1, name2):
    tx.run("""
        MATCH (a:Person {name: $name1}), (b:Person {name: $name2})
        CREATE (a)-[:FRIEND]->(b)
    """, name1=name1, name2=name2)

def find_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:
    session.write_transaction(create_person, "Alice")
    session.write_transaction(create_person, "Bob")
    session.write_transaction(create_friendship, "Alice", "Bob")
    friends = session.read_transaction(find_friends, "Alice")
    print(f"Alice's friends: {friends}")

driver.close()