The ROS Wiki is for ROS 1. Are you using ROS 2 (Humble, Iron, or Rolling)? Check out the ROS 2 Project DocumentationPackage specific documentation can be found on index.ros.org
rospy overview:
Initialization and Shutdown
Messages
Publishers and Subscribers
Services
Parameter Server
Logging
Names and Node Information
Time
Exceptions
Not from rospy itself:
tf/Overview (partially pythonic)
tf/Tutorials
Python Style Guide
Wiki: rospy/Overview (last edited 2013-05-24 14:23:26 by FelixKolbe)