ROS Topic Subscriber

01_02_ros_topic_subscriber.ipynb
Running the cell code

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import rospy
from std_msgs.msg import String

Import rospy modules
Import String from std_msgs.msg module

def callback(data):
    rospy.loginfo(rospy.get_caller_id() + "I heard %s", data.data)

Create callback() function
Node id and message data output

def listener():
    rospy.init_node('listener', anonymous=True)
    rospy.Subscriber("chatter", String, callback)
    rospy.spin()

Create listener function
Create listener Node
Subscribe to Chatter Topic Message
Handle Subscriber Callback

listener()

Run the listener function