Update README, remove print

danzimmerman · Jun 14, 2023 · 5fd205b · 5fd205b
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diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 Some examples of ROS 2 launch files in Python, XML, and YAML.
 
-## Argument Declaration examples
+## Argument declaration examples
 
 The launch files `arg_examples.launch.py`, `arg_examples.launch.xml`, and `arg_examples.launch.yaml` show off some features
 of argument declaration.
@@ -28,5 +28,17 @@ To see the declared arguments and their descriptions and valid choices, run:
 ros2 launch dz_launch_examples arg_examples.launch.<extension> --show-args
 ```
 
+## Node preparation in Python `OpaqueFunction`
+
+This provides an example of returning several talker/listener node pairs in consecutively numbered namespaces, inspired by [this post](https://answers.ros.org/question/416438/adding-node-from-within-opaquefunction-in-ros2-python-launch-file/).
+
+To launch three node pairs, for example, run:
+
+```
+ros2 launch dz_launch_examples opaque_multi_nodes.launch.py num_node_pairs:=3
+```
+
+
+
 
 
diff --git a/launch/opaque_multi_nodes.launch.py b/launch/opaque_multi_nodes.launch.py
@@ -7,7 +7,6 @@ def prepare_multiple_nodes(context, *args, **kwargs):
     
     """
     N_lc = launch.substitutions.LaunchConfiguration("num_node_pairs")
-    print(N_lc)
     N = int(N_lc.perform(context))
 
     nodes = []