django.core.exceptions.ImproperlyConfigured mysqlclient 1.3.13 or newer is required you have 0.9.3.

場景：Django 項目中使用了0.9.3舊版本的 mysql 數據庫，在生成 app 應用時報錯。

報錯信息關鍵部分：

manage.py@api_testing > startapp login
......
	File "D:\env_testing\lib\site-packages\django\db\backends\mysql\base.py", line 36, in <module>
    raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.

比較好的解決辦法(親測可用)：找到引入 pymsql 的文件，然後添加版本信息，添加一行代碼。
改動前：

import pymysql
pymysql.install_as_MySQLdb()

改動後：

import pymysql
pymysql.version_info = (1, 3, 13, "final", 0) # 解決mysql版本問題報錯而添加的代碼
pymysql.install_as_MySQLdb()

原因：

• Why do I know you are using pymysql? Because 0.9.3 is just the latest version of pymysql.
• Why use pymysql instead of mysqlclient for the project? Because it is easier to install. pymysql does not depend on system libraries, while mysqlclient relies on a series of system libraries such as libmysqlclient-dev.
• Why is mysqlclient difficult to install and Django still uses it by default? Because mysqlclient is faster and performs better. So if your project has high performance requirements, I suggest you remove the compatible code above and install mysqlclient in your project. If you need help during the installation of mysqlclient, please refer to this link: How to install Python MySQLdb module using pip?, and ensure libssl-dev has been installed before pip install mysqlclient.

其他方法：參考 stack overflow 上的其他建議。

ps：我特意先使用 google 搜索該問題，第一條搜索結果就可以解決該問題，而且還很簡單；然後我去百度同樣搜索，發現很多方法比較複雜，也沒有軟用，治標不治本，還浪費時間。