code: def cancel_broadcast(self, broadcast_guid):
          '''
          Cancel a broadcast specified by guid
          '''
          subpath = 'broadcasts/%s/update' % broadcast_guid
          broadcast = {'status': 'CANCELED'}
          bcast_dict = self._call(subpath, method='POST', data=broadcast,
              content_type='application/json')
          return bcast_dicf cancel_broadcast(self, broadcast_guid):
          '''
          Cancel a broadcast specified by guid
          '''
          subpath = 'broadcasts/%s/update' % broadcast_guid
          broadcast = {'status': 'CANCELED'}
          bcast_dict = self._call(subpath, method='POST', data=broadcast,
              content_type='application/json')
          return bcast_dict
docs: Cancel a broadcast specified by guid