Could a node can be stoped by another node ?

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Hello guys ! I want to stop a node, once its published message is subscribe by another node. For example

Node 1(publisher)

def bridge_opencv():
        image_pub = rospy.Publisher("quadrotor/videocamera1/camera_info",Image)

            cv2.namedWindow("Image window", 1)

        image_sub = rospy.Subscriber("quadrotor/videocamera1/image",Image, callback)


def callback(data):

        bridge = CvBridge()
        try:
            cv_image = bridge.imgmsg_to_cv2(data, "bgr8")
        except CvBridgeError, e:
            print e
        (rows,cols,channels) = cv_image.shape
        if cols > 60 and rows > 60 :
            cv2.circle(cv_image, (50,50), 10, 255)
                        x=5
                        puba.publish(x)                
        cv2.imshow("Image window", cv_image)
        cv2.waitKey(3)
def pilot():
       puba = rospy.Publisher("box_positiona", Float64)   
       bridge_opencv()
       rospy.spin()
if __name__ == '__main__':
        pilot()

Node 2 :(subscriber)

def where1(msg):
    global x1
    x1 = msg.data
    print x1

def ground():
    global cmd

    rospy.init_node("ground")   

    rospy.Subscriber("/box_positiona", Float64, where1)
        >>once i subscribe to that topic,stop node 1 immediatley
if __name__ == '__main__':
        ground()

Thanks a lot ! Looking forward for your answers