Python MySQL連接數據庫錯誤

Question

我正在嘗試使用Python和MySQL創建一個小型應用程序。 我設法使用MySQL連接來連接Python和MySQL。 但是現在當我嘗試運行此腳本以實際連接到數據庫時：

import mysql.connector

mydb = mysql.connector.connect(
    passwd="12345", 
    db="DB", 
    host="hostname", 
    user="root"
    )
print(mydb)

我收到很多錯誤，例如：

 File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\network.py", line 485, in open_connection
socket.SOL_TCP)

File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\socket.py", line 748, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11001] getaddrinfo failed
File "c:/Users/Krystian/Desktop/DB/db.py", line 7, in <module>
    user="root"

  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\__init__.py", line 179, in connect
    return MySQLConnection(*args, **kwargs)
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\connection.py", line 94, in __init__
    self.connect(**kwargs)
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\abstracts.py", line 722, in connect
    self._open_connection()
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\connection.py", line 207, in _open_connection
    self._socket.open_connection()
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\network.py", line 501, in open_connection
    errno=2003, values=(self.get_address(), _strioerror(err)))
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on 'hostname:3306' (11001 getaddrinfo failed)

我嘗試了其他與數據庫連接的方法，但是它們沒有用，我不確定現在該怎么辦。

在此先感謝您的幫助！

編輯1

正如Juergen所述，在修復了主機名之后，上面的大多數錯誤都消失了，但是出現了新的錯誤：

File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\connection.py", line 94, in __init__
    self.connect(**kwargs)
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\abstracts.py", line 722, in connect
    self._open_connection()
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\connection.py", line 211, in _open_connection
    self._ssl)
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\connection.py", line 141, in _do_auth
    auth_plugin=self._auth_plugin)
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\protocol.py", line 102, in make_auth
    auth_data, ssl_enabled)
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\protocol.py", line 58, in _auth_response
    auth = get_auth_plugin(auth_plugin)(
  File "C:\Users\Krystian\AppData\Local\Programs\Python\Python37-32\lib\site-packages\mysql\connector\authentication.py", line 191, in get_auth_plugin
    "Authentication plugin '{0}' is not supported".format(plugin_name))
mysql.connector.errors.NotSupportedError: Authentication plugin 'caching_sha2_password' is not supporte

Answer 1

我猜您的計算機（數據庫在其中運行）未命名為“主機名”：

    host="hostname", 

如果是本地計算機，請嘗試localhost 。 “主機名”只是示例代碼中的占位符。 您始終必須替換此類。

關於您的修改：

看起來您的數據庫服務器配置錯誤。 也許您需要在錯誤消息中命名的插件。

Answer 2

嘗試這個 ：

mysql.connector.connect(
        host="localhost",
        user="user_name",
        passwd="db_password",
        database="db_name")

Answer 3

好的，如上面的用戶所述，已經更正了主機名，並返回到舊版安全性以及創建新數據庫的問題得以解決。