Binary package “python3-std-msgs” in ubuntu focal

Python 3 interface for Standard Robot OS Messages

 This package is part of Robot OS (ROS). It contains the Python
 interface to libstd-msgs, which contains wrappers for ROS primitive
 types, which are documented in the msg specification. It also
 contains the Empty type, which is useful for sending an empty signal.
 .
 This package contains the Python 3 module.