修改url，

第一种场景：

   无论url怎么变，表单里面的url始终不变

  http://127.0.0.1:8000/CC/indexssssssssssssssssss/

url(r'^indexssssssssssssssssss/', views.index,name='indexx'),

<form action="{% url 'indexx' %}" method="POST">#}

def index(request):
    return  render(request,"index1.html",{'user_dict':USER_DICT}

第二种场景：

    url加ID

   http://127.0.0.1:8000/CC/indexssssssssssssssssss/3/

url(r'^indexssssssssssssssssss/(\d+)/', views.index,name='indexx'),

<form action="{% url 'indexx' 3 %}" method="POST">

def index(request,nid):
    print nid
    return  render(request,"index1.html",{'user_dict':USER_DICT})

第三种场景显示当前url：(适用于在当前页面提交之后继续留在当前页面)

   http://127.0.0.1:8000/CC/indexssssssssssssssssss/33/

url(r'^indexssssssssssssssssss/(\d+)/', views.index,name='indexx'),

 <form action="{{request.path_info}}" method="POST">#}

def index(request,nid):
    print request.path_info
    return  render(request,"index1.html",{'user_dict':USER_DICT,})

对URL路由关系进行命名， ***** 以后可以根据此名称生成自己想要的URL *****

url(r'^asdfasdfasdf/', views.index, name='i1'),
url(r'^yug/(\d+)/(\d+)/', views.index, name='i2'),
url(r'^buy/(?P<pid>\d+)/(?P<nid>\d+)/', views.index, name='i3'),


#反转生成url
def func(request, *args, **kwargs):
from django.urls import reverse

url1 = reverse('i1') # asdfasdfasdf/
url2 = reverse('i2', args=(1,2,)) # yug/1/2/
url3 = reverse('i3', kwargs={'pid': 1, "nid": 9}) # buy/1/9/


xxx.html

{% url "i1" %} # asdfasdfasdf/
{% url "i2" 1 2 %} # yug/1/2/
{% url "i3" pid=1 nid=9 %} # buy/1/9/

注：
# 当前的URL