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Python Class for simple subscriber

asked 2018-12-11 04:34:38 -0500

kk2105 gravatar image

Hi Guys,

Can anybody help me in getting the python class program for simple subscriber using Python.

Thank you, KK

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3

The tutorial page is here. Can you tell us exactly which part you need help with?

PeteBlackerThe3rd gravatar image PeteBlackerThe3rd  ( 2018-12-11 05:40:33 -0500 )edit

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answered 2018-12-11 21:46:53 -0500

Hamid Didari gravatar image

hi
this is an example code of simple python class that subscribe one topic:

#!/usr/bin/env python
import rospy
import sys
from std_msgs.msg import String

class simple_class:

  def __init__(self):
    self.sub = rospy.Subscriber("chatter",String,self.callback)

  def callback(self,data):
    print(data.data)



def main(args):
  obc = simple_class()
  rospy.init_node('simple_class', anonymous=True)
  try:
    rospy.spin()
  except KeyboardInterrupt:
    print("Shutting down")

if __name__ == '__main__':
    main(sys.argv)
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@hamid Thank you for the solution. Will try the same and post the updates.

kk2105 gravatar image kk2105  ( 2018-12-16 22:16:00 -0500 )edit

Hey I tried something similar, with a callback function defined within the class for the subscriber. But I receive an error for positional arguments. It asks me to have 'self' first and not 'data'. When I make the changes it now says 'data' first and 'self' second. Do you know what this could be?

Mojizs gravatar image Mojizs  ( 2023-03-05 19:37:14 -0500 )edit

I need to see your code and error. Please ask a new question and put your code in it.

Hamid Didari gravatar image Hamid Didari  ( 2023-03-06 09:33:40 -0500 )edit

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Asked: 2018-12-11 04:34:38 -0500

Seen: 6,771 times

Last updated: Dec 11 '18