Note that only Django core commands are listed as settings are not properly configured (error: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment

def main():
  #  os.environ.setdefault('DJANGO__MODULE', 'testDjango.settings')
    os.environ.setdefault('DJANGO_SETTINGS_MODULE','testDjango.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise 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?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()

部署服务器以后 修改  

修改配置    

DJANGO_SETTINGS_MODULE
我也不知道为啥。。。。就这么成功了