django.core.exceptions.ImproperlyConfigured: Requested setting CACHES, but settings are not configur

django.core.exceptions.ImproperlyConfigured: Requested setting CACHES, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

import xadmin时出了这个问题，很奇怪

先migrate后再runserver就没问题了