[fix] fix learning tf bug

learning_tf/scripts/turtle_tf_listener.py

@@ -28,7 +28,7 @@ def main():
   rate = rospy.Rate(10)
   while not rospy.is_shutdown():
     try:
-      (translation, rotation) = tf_listener.lookupTransform("/turtle2", "turtle1", torpy.Time(0))
+      (translation, rotation) = tf_listener.lookupTransform("/turtle2", "turtle1", rospy.Time(0))
     except (tf.LookupException, tf.ConnectivityException, tf.ExtrapolationException):
       continue
 
@@ -44,5 +44,7 @@ def main():
     
     cmd_pub.publish(cmd_vel)
     
+    rate.sleep()
+
 if __name__ == "__main__":
   main()

learning_tf/src/turtle_tf_listener.cpp

@@ -53,10 +53,6 @@ int main(int argc, char ** argv) {
         ros::spinOnce();
     }
 
-
-
-
-
     return 0;
 }