三种格式:
(1)incude(module,namespace=None)
from django.urls import path,include from book urls urlpatterns={ path('',include(urls)) }
module:模型文件,namespace:实例命名空间
(2)include(pattern_list)
from . views extractpatterns='index'),path(index/',1)">''home/,} urlpatterns=) }
pattern_list:可迭代的path()或re_path()清单
(3)include((pattern_list,app_namespace),namespace)
app_namespace:app命名空间
) path() } urlpatterns=newsapp')),1)">) }