The rcl_interfaces Log message level field does not match the type of constants. The constants are of type byte and the field is of type uint8.

This means the following Python code fails with an exception:

from rcl_interfaces.msg import Log
msg = Log()
msg.level = Log.INFO

To get this to work, something like this needs to be done which is a bit ridiculous:

from rcl_interfaces.msg import Log
msg = Log()
msg.level = int.from_bytes(Log.INFO, byteorder='little')

Either the level field needs to be changed to a byte type or the constants should be changed to uint8. I don't think rclpy should be expected to do a silent conversion between types to make this work correctly.