关于Django报错django.core.exceptions.ImproperlyConfigured: Requested setting DEBUG, but settings are not configure

报错代码：
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 settingsdjango.core.exceptions.ImproperlyConfigure