Django 学习，异常解决记录

1、Django throws django.core.exceptions.AppRegistryNotReady: Models aren’t loaded yet
或者报错：
django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TABLESPACE, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

    import django 
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "PROJECT_NAME.settings")
    django.setup()
    from APP_NAME.models import *

PROJECT_NAME，是自己django项目名