我刚刚卸载了python3.6,然后安装了python3.7,当我在一个虚拟环境中安装django,然后输入django-admin时,就会出现这个错误。Note that only Django core commands are listed as settings are not properly configured(error: Requestedsetting INSTALLED_APPS, but settings are not configured.You must either define the environmen