Django get old url

Question

In django views,From the request how would we know from which page this view was called

 def password_change(request):
   if request.method == 'POST':
      u=request.user
      u.set_password(request.POST.get('new_password'))
      u.save()
      post_change_redirect= //Need old link here 
      return HttpResponseRedirect(post_change_redirect)

Answer 1

try request.path

Answer 2

request.path

will return the full path (not including the domain).

e.g. /music/bands/the_beatles/

Answer 3

Normally a variable in the query string (accessible via request.GET) is used to instruct the view where to redirect to.