1. 安装Python Neo4j模块：C:\windows\system32>pip install neo4j

2. 按装Python虚拟环境：pip install virtualenv

3. 注意运行目录（系统要允许在该目录下创建）：C:\Users\bing.yao>python -m venv sandbox

4. 在虚拟环境Sandbox所在目录运行：C:\Users\bing.yao\sandbox\Scripts\activate.bat

5. 激活/进入虚拟环境后可查看Python版本，安装：pip install neo4j

6. 按照示例为现有节点创建关系，注意是现有节点

7. 按照示例查找节点

参考：https://docs.python.org/3/tutorial/venv.html#managing-packages-with-pip

参考：https://neo4j.com/docs/api/python-driver/4.2/

creatingNodes.py

from neo4j import GraphDatabase

uri = "neo4j://localhost:7687"

driver = GraphDatabase.driver(uri, auth=("neo4j", "xxxx"))

def create_friend_of(tx, name, friend):

    tx.run("MATCH (a:Person) WHERE a.name = $name "

          "CREATE (a)-[:KNOWS]->(:Person {name: $friend})",

          name=name, friend=friend)

with driver.session() as session:

    session.write_transaction(create_friend_of, "Rain", "Bill Pullman")

with driver.session() as session:

    session.write_transaction(create_friend_of, "Rain", "Danny DeVito")

print("test1")

driver.close()

findingNodes.py

from neo4j import GraphDatabase

uri = "neo4j://localhost:7687"

driver = GraphDatabase.driver(uri, auth=("neo4j", "xxxx"))

def get_friends_of(tx, name):

    friends = []

    result = tx.run("MATCH (a:Person)-[:KNOWS]->(f) "

                        "WHERE a.name = $name "

                        "RETURN f.name AS friend", name=name)

    for record in result:

        friends.append(record["friend"])

    return friends

with driver.session() as session:

    friends = session.read_transaction(get_friends_of, "Rain")

    for friend in friends:

        print(friend)

driver.close()