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if __name__=='__main__':
     rospy.init_node('robot_news_radio_transmitter', String, queue_size=10)

queue_size is not an argument of rospy.init_node(..), but of rospy.Publisher(..).

if __name__=='__main__':
     rospy.init_node('robot_news_radio_transmitter', String, queue_size=10)

queue_size is not an argument of rospy.init_node(..), but of rospy.Publisher(..).

See the documentation:

__init__(self, name, data_class, subscriber_listener=None, tcp_nodelay=False, latch=False, headers=None, queue_size=None)
Constructor

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