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Can I find ROS topics (publishers and subscribers) only from launch file?

asked 2020-03-18 10:42:37 -0500

TestUser
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Hi guys, I'm kinda new at ROS. I'm trying to read a launch file in Python and to find all the nodes and topics? I can find nodes easily using roslaunch.node_args. Is finding the topics possible without executing the launch file?

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answered 2020-03-18 11:52:57 -0500

nickw

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You may be able to work out some from the launch file, if any names are remapped, but other than that not from just reading the launch file, unless you are very familiar with the nodes it launches and know what topics they publish and subscribe to.

You could find it out by looking at the documentation for each of the nodes

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Asked: 2020-03-18 10:42:37 -0500

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Last updated: Mar 18 '20

Can I find ROS topics (publishers and subscribers) only from launch file? edit

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Can I find ROS topics (publishers and subscribers) only from launch file?