django - Django signals - Wait for signal in function

Question

I am using django and I want to send a signal from one function and and create a 'wait-point' in the middle of another function for that signal.

In more detail, I am using a 3rd party api. So,

def foo():
   id = thirdPartyFunction(action='/bar')
   id.save()
   # send signal!
   return render_to_response('pleaseWait.html')

def bar():
   # initialize this and that
   # ...
   # WAIT FOR SIGNAL
   return HttpResponseRedirect('success.html')

How do I create a listener in the middle of a function. Currently, my understanding is that the signal dispatcher calls another function. I have no idea how to do this.

Thanks for your time and help :)