django 第一次运行出错

直接运行整个项目正常，直接运行url文件报错

报错内容：

E:\Python\python.exe D:/Python储存文件/ceshiweb/ceshiweb/urls.py
Traceback (most recent call last):
File "D:/Python储存文件/ceshiweb/ceshiweb/urls.py", line 28, in <module>
url(r'^admin/', admin.site.urls),
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\contrib\admin\sites.py", line 267, in urls
return self.get_urls(), 'admin', self.name
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\contrib\admin\sites.py", line 225, in get_urls
from django.contrib.contenttypes import views as contenttype_views
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\contrib\contenttypes\views.py", line 5, in <module>
from django.contrib.contenttypes.models import ContentType
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\contrib\contenttypes\models.py", line 138, in <module>
class ContentType(models.Model):
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\contrib\contenttypes\models.py", line 139, in ContentType
app_label = models.CharField(max_length=100)
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\db\models\fields\__init__.py", line 1043, in __init__
super(CharField, self).__init__(*args, **kwargs)
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\db\models\fields\__init__.py", line 166, in __init__
self.db_tablespace = db_tablespace or settings.DEFAULT_INDEX_TABLESPACE
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\conf\__init__.py", line 53, in __getattr__
self._setup(name)
File "E:\Python\lib\site-packages\django-1.10.8-py3.6.egg\django\conf\__init__.py", line 39, in _setup
% (desc, ENVIRONMENT_VARIABLE))
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.

解决方案：

在代码开始出添加：

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