Print a msg from a Turtlebot3 subscriber

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Hey,

I am just trying to print a msg that is subscribed from the cmd_vel_rc100 message. Here is some of the code:

def moving(self):
        self.pub_cmd_vel = rospy.Publisher('cmd_vel', Twist, queue_size=5)
        while self.finish:
            vel_cmd = Twist()
            vel_cmd_received = Twist()
            vel_cmd.linear.x = 0
            self.pub_cmd_vel.publish(vel_cmd)
            vel_cmd_received = rospy.Subscriber('cmd_vel_rc100', Twist, queue_size=5)
            print vel_cmd_received
            self.finish = False

When I run the node, I see the following in the terminal for the cmd_vel_rc100:

<rospy.topics.Subscriber object at 0x7fd7a0436d50>

Normally, the node must be of type Twist(). My question is now, why don´t I see the normal Twist message?

Thanks for your help!