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I have this sample of code:
def ranger(channel, frame_id):
range_pub = rospy.Publisher('~', Range, queue_size=10)
rate = rospy.Rate(15)
and this sample
if __name__ == '__main__':
rospy.init_node('obstacle_sensor', anonymous=True)
c = rospy.get_param('~channel')
f = rospy.get_param('~frame_id')
try:
ranger(channel=c, frame_id=f)
except rospy.ROSInterruptException:
pass
Any help?
The tilde means "local namespace" and will prefix your node name to the value after the tilde. So if your node was named "my_node" and you publish to "~topic" the actual topic name published will be "my_node/topic".
Asked: 2022-07-08 14:25:10 -0500
Seen: 203 times
Last updated: Jul 08 '22
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As it's already been answered we'll leave this open, but it's a duplicate of #q250092 (which has a very similar title: "Ask about the usage of the tilde '~'sign").