C:\Anaconda3\python.exe C:/pycharm.z/neo.py Traceback (most recent call last): File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 806, in acquire cx = self._free_list.popleft() IndexError: pop from an empty deque During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Anaconda3\lib\site-packages\py2neo\client\bolt.py", line 810, in _audit task.audit() File "C:\Anaconda3\lib\site-packages\py2neo\client\bolt.py", line 1303, in audit raise self._failure py2neo.errors.ClientError: [Security.Unauthorized] The client is unauthorized due to authentication failure. During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\pycharm.z\neo.py", line 4, in <module> graph = Graph("bolt://localhost:7687", auth=("neo4j", "password")) File "C:\Anaconda3\lib\site-packages\py2neo\database.py", line 288, in __init__ self.service = GraphService(profile, **settings) File "C:\Anaconda3\lib\site-packages\py2neo\database.py", line 119, in __init__ self._connector = Connector(profile, **connector_settings) File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 960, in __init__ self._add_pools(*self._initial_routers) File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 982, in _add_pools pool = ConnectionPool.open( File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 649, in open seeds = [pool.acquire() for _ in range(init_size or cls.default_init_size)] File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 649, in <listcomp> seeds = [pool.acquire() for _ in range(init_size or cls.default_init_size)] File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 813, in acquire cx = self._connect() File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 764, in _connect cx = Connection.open(self.profile, user_agent=self怎么解决

根据您提供的错误信息，出现了两个异常：IndexError和ClientError。IndexError表示连接池中没有可用的连接，而ClientError表示由于身份验证失败而导致未经授权的客户端。

解决这些问题的步骤如下：

1. 确保您提供的Neo4j数据库URL和凭据是正确的。检查URL中的主机名、端口号以及凭据的用户名和密码是否与您在Neo4j中设置的一致。

2. 确保Neo4j数据库正在运行并监听正确的端口。您可以尝试通过浏览器访问Neo4j的管理界面来验证数据库是否可用。

3. 检查防火墙设置，确保允许连接到Neo4j数据库所使用的端口。

4. 如果您在使用用户名和密码进行身份验证时仍然遇到问题，可以尝试更改身份验证方法。例如，您可以尝试使用Kerberos或LDAP进行身份验证，具体取决于您在Neo4j中的配置。

5. 确保您的py2neo库版本是最新的。您可以使用以下命令升级py2neo库：

pip install --upgrade py2neo

如果问题仍然存在，请检查您的代码是否有其他问题，并考虑向Neo4j社区寻求更多帮助。