How to mention "Namespace" tag and value in ros2 launch python script.?

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Hi, I am launching ros2 package with a python launch file.

Contents of my launch file are import launch import launch_ros.actions

def generate_launch_description():
        return launch.LaunchDescription(
        [launch_ros.actions.Node(package='sunny_pkg', node_executable='sunny_node', output='screen',
        parameters=[{
        'name' : 'Sunny',
        'id' : 28}]
        ),])

How to provide the namespace tag and value in this file. In ROS1, it was simple tag/value, like

<node name="sunny_node" pkg="sunny_pkg" type="sunny" ns="sunny_ns">