http://chriskief.com/2012/12/22/django-register-with-oauth-twitter/

twitter.py

def verify(request):
        # Twitter will direct with oauth_token and oauth_verifier in the URL
        # ?oauth_token=EoSsg1...&oauth_verifier=NB3bvAkb...

        # did the user deny the request
        if 'denied' in request.GET:
            return False

        # ensure we have a session state and the state value is the same as what twitter returned
        if 'twitter_request_token_key' not in request.session \
           or 'oauth_token' not in request.GET \
           or 'oauth_verifier' not in request.GET \
           or request.session['twitter_request_token_key'] != request.GET['oauth_token']:
            return False
        else:
            return True