django-URL反向解析Reverse（九）

from django.http import HttpResponse
from django.shortcuts import render,redirect,reverse

# Create your views here.
def index(request):
    username = request.GET.get("username")
    if username is not None:
        return HttpResponse("welcome!")
    else:
        return redirect(reverse(‘loose‘,kwargs={‘a‘:100,‘b‘:200}))

def error(request,a,b):
    sum=a+b
    return HttpResponse("<h1>sum:{}</h1>".format(sum))

from django.urls import path
from . import views

urlpatterns = [
    path(‘‘, views.index,name=‘index‘),
    path(‘error/<int:a>/<int:b>‘, views.error,name=‘loose‘),
]