如何在ROS2 dashing中使用参数启动节点？

my_param1: 10
my_param2: "hello"

from launch import LaunchDescription
from launch_ros.actions import Node
from launch.actions import DeclareLaunchArgument
from launch.substitutions import LaunchConfiguration

def generate_launch_description():
    return LaunchDescription([
        DeclareLaunchArgument(
            'params_file',
            default_value='my_params.yaml',
            description='Path to the params file'
        ),
        Node(
            package='my_package',
            executable='my_node',
            name='my_node',
            parameters=[LaunchConfiguration('params_file')]
        )
    ])

ros2 launch my_package my_launch.py params_file:=/path/to/my_params.yaml