Question

当我使用PHP时，我可以通过在我的php脚本中编写以下行来连接到localhost上的phpMyAdmin：

<?php

$dbServername = 'localhost';
$dbUsername = 'root';
$dbPassword = '';
$dbName = 'Work';

$conn = mysqli_connect($dbServername, $dbUsername, $dbPassword, $dbName);

?>

（此脚本的目录为/Users/User/.bitnami/stackman/machines/xampp/volumes/root/htdocs/index.php）

在运行上述行之前，我首先激活了XAMPP并启用了端口localhost:8080。 phpMyAdmin位于http://localhost:8080/phpmyadmin/。 这可以很好地连接到数据库。

现在，在Python中我已经下载了PyMySQL，并且我编写了以下几行来完成同样的简单任务：

import pymysql

conn = pymysql.connect(host='localhost', user='root', password='', db='Work')

（此脚本的目录为/Users/User/PycharmProjects/First/Main.py）

然而，当我尝试运行它时（在我首次激活XAMPP并且我启用了端口localhost:8080之后），我收到以下错误：

Traceback (most recent call last):
  File "/Users/User/Library/Python/3.6/lib/python/site-packages/pymysql/connections.py", line 920, in connect
    **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/socket.py", line 724, in create_connection
    raise err
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/socket.py", line 713, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/User/PycharmProjects/GCP-OCR/Main.py", line 14, in <module>
    conn = pymysql.connect(host='localhost', user='root', password='', db='Work')
  File "/Users/User/Library/Python/3.6/lib/python/site-packages/pymysql/__init__.py", line 90, in Connect
    return Connection(*args, **kwargs)
  File "/Users/User/Library/Python/3.6/lib/python/site-packages/pymysql/connections.py", line 699, in __init__
    self.connect()
  File "/Users/User/Library/Python/3.6/lib/python/site-packages/pymysql/connections.py", line 967, in connect
    raise exc
pymysql.err.OperationalError: (2003, "Can't connect to MySQL server on 'localhost' ([Errno 61] Connection refused)")

如何修复此错误并最终将我的Python脚本连接到MySQL数据库？

此外，请注意，即使我将localhost替换为127.0.0.1，我也会收到完全相同的错误。此外，如果我将localhost替换为localhost:3306，那么我也是一个错误（socket.gaierror: [Errno 8] nodename nor servname provided, or not known）。

Answer 1

PyMySQL接受端口作为独立参数。试试这个：

conn = pymysql.connect(host='localhost', port=3306, user='root', passwd='', db='Work')

请参阅此链接：PyMySQL

Answer 2

我只按照下面URL中给出的步骤进行操作，它们提供了示例代码以从MySQLdb插件和PyMySQL插件进行连接。

对我来说，MySQLdb提供输出，而PyMySQL提供连接错误，就像您得到的一样。

https://www.a2hosting.in/kb/developer-corner/mysql/connecting-to-mysql-using-python

Python脚本（PyMySQL）不连接到localhost上的数据库

2 个答案: