[ROS in 5 mins] 046 - What is ROS Namespace

Hello Everyone

In today's video we're going to see what is ROS Namespace and how it works.

For that we're going to use Robot Ignite Academy, which is the best tool if you want Learn ROS Fast: http://bit.ly/2Oc2pJK

Before we start, if you are new to ROS, I highly recommend you to take any of the following courses on Robot Ignite Academy:

▸ ROS Basics In 5 Days (Python) - http://bit.ly/2Ob4J3J
▸ ROS Basics In 5 Days (C++) - http://bit.ly/2Obn80y


The commands used during the video to create the package were the following:

cd ~/catkin_ws/src/
catkin_create_pkg tutorial rospy geometry_msgs
cd tutorial/src/
touch robot.py
chmod +x robot.py
source ~/catkin_ws/devel/setup.bash

The content of robot.py was:

#! /usr/bin/env python
import rospy
from geometry_msgs.msg import Pose

rospy.init_node('robot', anonymous=True)
pub = rospy.Publisher('my_position', Pose, queue_size=1)
rate = rospy.Rate(1) # 1hz

while not rospy.is_shutdown():
pub.publish(Pose())
rate.sleep()


Then the following commands were used to run our publisher and list our topics:

rosrun tutorial robot.py __ns:=robot1
rosrun tutorial robot.py __ns:=robot2

rostopic list | grep my_pos


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Thanks for watching.