寫url和檢視的的對應關係
from django.conf.urls import url
from django.contrib import admin
from app名 import views
urlpatterns = [

# FBV 寫法
url(r'^admin/', admin.site.urls), # admin 後臺管理
# 對應 檢視中的函式
url(r'login/', views.login, name='login'),
# 正則分組
url(r'del_(student|teacher|class)/(\d+)/', views.delete, name='del'),
# 正則命名分組
url(r'^data/(?P

   # name='login'  url命名  用於 地址的反向解析

# CBV 寫法
# 在views.py檔案中 寫一個類 繼承 View 其中寫 get post 方法
# 匯入方法from django.views import View
url(r'index/', views.類名.as_view(), name='index'),

]

url路由分發
from django.conf.urls import url, include
from django.contrib import admin
from crm import views

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

    url(r'^show/', include('app名.urls檔名', namespace='show')),
    # namespace='show' 名稱空間 
]