1 from django.shortcuts import render_to_response
   2 
   3 def addnumber(request,what):
   4 
   5     if not what or not 'numbers' in request.session:
   6         request.session['numbers']=[]
   7     else:
   8         try:
   9             what_int=int(what)
  10             request.session['numbers']+=[what_int]
  11         except:
  12             pass
  13     numbers=request.session['numbers']
  14     candidates=range(1,10)
  15     return render_to_response('add.html',
  16         {'numbers':numbers,'candidates':candidates} )
  17 
  18 def addnull(request):
  19 
  20     return addnumber(request,None)
  21 
  22 def sum(request):
  23 
  24     if not 'numbers' in request.session:
  25         request.session['numbers']=[]
  26     sum=0
  27     for num in request.session['numbers']:
  28         sum+=num
  29     request.session['numbers']=[]
  30     return render_to_response('sum.html',{'sum':sum} )