python3 manage.py rebuild_index

......(前面一堆报错)
File "/home/python/Django/test6/test6/urls.py", line 20, in <module>
  url(r'^admin/', include(admin.site.urls)),
 File "/home/python/.virtualenvs/py_django/lib/python3.6/site-packages/django/urls/conf.py", line 27, in include
  'provide the namespace argument to include() instead.' % len(arg)
django.core.exceptions.ImproperlyConfigured: Passing a 3-tuple to include() is not supported. Pass a 2-tuple containing the list of patterns and app_name, and provide the namespace argument to include() instead.

url(r'^admin/', include(admin.site.urls)),

url(r'^admin/', admin.site.urls),