topic_template_py.launch

<launch>
    <group ns = "topic_template">
        <!-- publisher -->
        <node pkg="ros_template_programs" type="topic_publisher_template.py" name="publisher" launch-prefix="xterm -font r16 -fg floralwhite -bg darkslateblue -e">
            <rosparam>
                message : Hello, World!! 1
            </rosparam>
        </node>
        <node pkg="ros_template_programs" type="topic_publisher_template.py" name="publisher2" launch-prefix="xterm -font r16 -fg floralwhite -bg darkslateblue -e">
            <rosparam>
                message : Hello, World!! 2
            </rosparam>
        </node>
        <!-- subscriber -->
        <node pkg="ros_template_programs" type="topic_subscriber_template.py" name="subscriber" launch-prefix="xterm -font r16 -fg floralwhite -bg darkslateblue -e">
        </node>
    </group>
</launch>