從命令行運行django數據庫操作

從命令行運行django數據庫操作，報錯：

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.

或

django.core.exceptions.ImproperlyConfigured: settings.DATABASES is improperly configured. Please supply the ENGINE value. Check settings documentation for more details.

看settings.py沒有問題

解決的方法：

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")

注意這個是不行的：

from django.conf import settings
settings.configure()

兩者都寫也是不行的