Python脚本（PyMySQL）无法连接到本地主机上的数据库

Question

当我使用PHP时，只需在php脚本中编写以下行即可连接到localhost上的phpMyAdmin：

<?php

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

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

?>

（此脚本的目录是/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/ 。 这样可以很好地连接到数据库。

现在，在Python中，我下载了PyMySQL ，并编写了以下几行代码来完成相同的简单任务：

import pymysql

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

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

但是，当我尝试运行此命令（首先激活XAMPP并启用端口localhost:8080 ）之后，出现以下错误：

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)")

如何解决此错误，最后将我的Python脚本连接到MySQL数据库？

此外，请记住，即使我将localhost替换为127.0.0.1 ，也会遇到完全相同的错误。 而且，如果我用localhost:3306替换localhost ，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port作为独立参数。 试试看：

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

参考此链接： PyMySQL

Answer 2

只要我按照下面URL中给出的步骤进行操作，它们就会提供示例代码以连接MySQLdb插件和PyMySQL插件。

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