Why do we use equal sign?
In these two lines, the author has used the equal sign inside the parenthesis.
self.vel_pub = rospy.Publisher(name=self.cmd_vel_topic, data_class=Twist, queue_size=10)
and
self.front_topic_subscriber = rospy.Subscriber(name=self.front_sensor_topic, data_class=Range, callback=self.front_callback)
for example: name=self.cmd_vel_topic
Why did he do that?