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'),
]