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我是 neo4j 的新手，正在尝试执行 neo4j 网站中提供的演示项目（电影搜索）。这样做时，我从 python 实例化 neo4j 服务器时遇到错误。或者，我可以在外部启动和运行 neo4j 服务器并使用它。请找到 python 代码片段和错误详细信息 -

import os
from json import dumps
from flask import Flask, g, Response, request
from neo4j.v1 import GraphDatabase, basic_auth
app = Flask(__name__, static_url_path='/static/')
password = os.getenv("NEO4J_PASSWORD")
driver = GraphDatabase.driver('bolt://localhost',auth=basic_auth("neo4j", password))
.
.

当我运行上面提到的代码时，我收到以下错误消息：

Traceback (most recent call last):
File "movies.py", line 12, in <module>
driver = GraphDatabase.driver('bolt://localhost',auth=basic_auth("neo4j", password))
File "C:\Users\611593250\AppData\Local\Programs\Python\Python36-32\lib\site-packages\neo4j\v1\api.py", line 124, in driver
return driver_class(uri, **config)
File "C:\Users\611593250\AppData\Local\Programs\Python\Python36-32\lib\site-packages\neo4j\v1\direct.py", line 65, in __init__
pool.release(pool.acquire())
File "C:\Users\611593250\AppData\Local\Programs\Python\Python36-32\lib\site-packages\neo4j\v1\direct.py", line 44, in acquire
raise ServiceUnavailable("Cannot acquire connection to {!r}".format(self.address))
neo4j.exceptions.ServiceUnavailable: Cannot acquire connection to Address(host='localhost', port=7687)

请指教。提前致谢！

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1 回答 1

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在定义螺栓 url 时，您必须添加螺栓端口，如下所示：

import os
from json import dumps
from flask import Flask, g, Response, request
from neo4j.v1 import GraphDatabase, basic_auth
app = Flask(__name__, static_url_path='/static/')
password = os.getenv("NEO4J_PASSWORD")
driver = GraphDatabase.driver('bolt://localhost:7687',auth=basic_auth("neo4j", password))
print driver

希望这可以帮助！

于 2017-11-06T10:16:44.223 回答