Django--django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TABLESPACE

Django序列化时遇到错误：

django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TABLESPACE
需要添加环境变量

import os,django
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "project_name.settings")# project_name 项目名称
django.setup()