django - Success variable message is assigned referenced before assignment -

i'm trying show success message after posting data on form.

def addcostumer(request):     form = costumerform(request.post or none)     if form.is_valid():         save_it = form.save(commit=false)         save_it.save()         message = "data sent!"      return render_to_response('nuevocliente.html', {'message': message}, context_instance=requestcontext(request),) 

you need check if request indeed post , show message if form submitted indeed valid.

also, looks forgot send actual form in context.

def addcostumer(request):     form = costumerform()     message = none #set message none default      if request.method == 'post':         form = customerform(request.post)         if form.is_valid():             save_it = form.save(commit=false)              save_it.save()             message = "data sent!" #set message if object saved successfully.      return render_to_response('nuevocliente.html', {'message': message, 'form': form}, context_instance=requestcontext(request))