def unregister(self,listener):
        del self.listeners[listener]             
                   
#---------------test functions--------------
HTTP 200 should return if data is valid.
dataset/ETHPy150Open cmorgan/trading-with-python/lib/eventSystem.py/Sender.unregister--crossover with--dataset/ETHPy150Open rapidsms/rapidsms/rapidsms/backends/vumi/tests.py/VumiViewTest.test_valid_response_post