in tts/src/tts/synthesizer.py [0:0]
def start(self, node_name='synthesizer_node', service_name='synthesizer'):
"""The entry point of a ROS service node.
:param node_name: name of ROS node
:param service_name: name of ROS service
:return: it doesn't return
"""
rospy.init_node(node_name)
service = rospy.Service(service_name, Synthesizer, self._node_request_handler)
rospy.loginfo('{} running: {}'.format(node_name, service.uri))
rospy.spin()