def set_loudness(self, instance_id=0, channel='Master', desired_loudness=0):
    action = self.service.get_action('SetLoudness')
    return action.call(InstanceID=instance_id, Channel=channel, DesiredLoudness=desired_loudness)
def set_loudness(self, instance_id=0, channel='Master', desired_loudness=0):
    action = self.service.get_action('SetLoudness')
    return action.call(InstanceID=instance_id, Channel=channel, DesiredLoudness=desired_loudness)