一、问题

执行python manage.py runserver命令时出现以下错误 

Traceback (most recent call last):
  File "manage.py", line 11, in main
    from django.core.management import execute_from_command_line
ModuleNotFoundError: No module named 'django'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 13, in main
    raise ImportError(
ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?

如下： 

即：importterror:无法导入Django。您确定它已在PYTHONPATH环境变量中安装并可用吗?你忘记激活虚拟环境了吗

二、解决办法

2.1方式一：直接安装

pip install django

2.2方式二：更换已安装django的python解释器

未安装django的python3.8，如下

已安装django的python3.10，如下

打开环境变量，打开步骤：右键单击此电脑→属性→高级系统设置→高级→环境变量→系统变量→

将python3.10解释器上移至anaconda之前，如下

三、效果

更换前后效果如下 （编辑环境变量后需重新打开终端）

运行成功 

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