AuthError尝试从python连接到neo4j

问题描述

我正在尝试在docker容器中运行neo4j，并通过未在容器中运行的python脚本连接到它，但是我遇到了AuthError。

我正在按照here

的说明进行操作

启动neo4j

docker run \
    --publish=7474:7474 --publish=7687:7687 \
    --volume=$HOME/neo4j/data:/data \
    --volume=$HOME/neo4j/logs:/logs \
    neo4j:3.5

我还通过添加了这些指示来完成此操作：“默认情况下，Neo4j需要身份验证，并要求您在第一个连接时使用neo4j / neo4j登录并设置新密码。您可以通过指定来直接设置Docker容器的密码--env NEO4J_AUTH = neo4j /在您的运行指令中。”

启动neo4j

docker run \
    --publish=7474:7474 --publish=7687:7687 \
    --volume=$HOME/neo4j/data:/data \
    --volume=$HOME/neo4j/logs:/logs \
    --env NEO4J_AUTH=neo4j/neo \
    neo4j:3.5

完成上述任一操作后，我可以通过Web界面（位于http：// localhost：7474 /

）进行连接

现在，我要按照here所述连接python脚本，让我运行此代码（请注意，我已更改密码，以匹配docker命令中的NEO4J_AUTH设置）。

从neo4j导入GraphDatabase

class HelloWorldExample:

    def __init__(self,uri,user,password):
        self.driver = GraphDatabase.driver(uri,auth=(user,password))

    def close(self):
        self.driver.close()

    def print_greeting(self,message):
        with self.driver.session() as session:
            greeting = session.write_transaction(self._create_and_return_greeting,message)
            print(greeting)

    @staticmethod
    def _create_and_return_greeting(tx,message):
        result = tx.run("CREATE (a:Greeting) "
                        "SET a.message = $message "
                        "RETURN a.message + ',from node ' + id(a)",message=message)
        return result.single()[0]


if __name__ == "__main__":
    greeter = HelloWorldExample("bolt://localhost:7687","neo4j","neo")
    greeter.print_greeting("hello,world")
    greeter.close()

运行此代码时，我会收到此错误。

Traceback (most recent call last):
File "/Users/j/projects/neotest/neo.py",line 25,in <module>
    greeter = HelloWorldExample("bolt://localhost:7687","neo4j")
File "/Users/j/projects/neotest/neo.py",line 6,in __init__
    self.driver = GraphDatabase.driver(uri,password))
File "/usr/local/lib/python3.7/site-packages/neo4j/__init__.py",line 183,in driver
    return cls.bolt_driver(parsed.netloc,auth=auth,**config)
File "/usr/local/lib/python3.7/site-packages/neo4j/__init__.py",line 196,in bolt_driver
    return BoltDriver.open(target,line 359,in open
    pool = BoltPool.open(address,pool_config=pool_config,workspace_config=default_workspace_config)
File "/usr/local/lib/python3.7/site-packages/neo4j/io/__init__.py",line 531,in open
    seeds = [pool.acquire() for _ in range(pool_config.init_size)]
File "/usr/local/lib/python3.7/site-packages/neo4j/io/__init__.py",in <listcomp>
    seeds = [pool.acquire() for _ in range(pool_config.init_size)]
File "/usr/local/lib/python3.7/site-packages/neo4j/io/__init__.py",line 545,in acquire
    return self._acquire(self.address,timeout)
File "/usr/local/lib/python3.7/site-packages/neo4j/io/__init__.py",line 409,in _acquire
    connection = self.opener(address,line 528,in opener
    return Bolt.open(addr,timeout=timeout,routing_context=routing_context,**pool_config)
File "/usr/local/lib/python3.7/site-packages/neo4j/io/__init__.py",line 227,in open
    raise error
File "/usr/local/lib/python3.7/site-packages/neo4j/io/__init__.py",line 222,in open
    connection.hello()
File "/usr/local/lib/python3.7/site-packages/neo4j/io/_bolt3.py",line 148,in hello
    self.fetch_all()
File "/usr/local/lib/python3.7/site-packages/neo4j/io/_bolt3.py",line 393,in fetch_all
    detail_delta,summary_delta = self.fetch_message()
File "/usr/local/lib/python3.7/site-packages/neo4j/io/_bolt3.py",line 339,in fetch_message
    response.on_failure(summary_Metadata or {})
File "/usr/local/lib/python3.7/site-packages/neo4j/io/_bolt3.py",line 544,in on_failure
    raise AuthError(message)
neo4j.exceptions.AuthError: {code: None} {message: None}

解决方法

您的错误确实表明代码有所不同：

Traceback (most recent call last):
File "/Users/j/projects/neotest/neo.py",line 25,in <module>
    greeter = HelloWorldExample("bolt://localhost:7687","neo4j","neo4j")

此处显示您使用密码“ neo4j”而不是“ neo”启动了HelloWorldClass

neo4j python