我的项目目录中有以下urls.py文件：
from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('wb.views',
url(r'^areas/$', 'arealist'),
url(r'^areas/(?P<area_id>\d+)/$', 'area_roomlist'),
url(r'^areas/(?P<area_id>\d+)/rooms/(?P<room_id>\d+)/$', 'area_roomdetail'),
url(r'^areas/add_area/$','add_area'),
url(r'^areas/area_added/$', 'area_added'),
url(r'^rooms/$', 'roomlist'),
url(r'^rooms/(?P<room_id>\d+)/$', 'roomdetail'),
url(r'^rooms/add_room/$', 'add_room'),
url(r'^rooms/room_added/$', 'room_added'),
url(r'^room_exits/$', 'room_exit_list'),
url(r'^room_exits/add_room_exit/$', 'add_room_exit'),
url(r'^room_exits/room_exit_added/$', 'room_exit_added'),
)
urlpatterns += patterns('',
url(r'^admin/', include(admin.site.urls)),
)
每当我尝试加载页面时，都会收到以下错误：
ImportError at /page/, No module named urls
有谁知道发生了什么？提前致谢。