How to reset gazebo simulation in ROS2

Hello,
I am working on the rosject and I need to reset the world i i.e reset the models to their initial states n case robot behaves unexpectedly. However, after pressing ctrl + R, the robot does not move to the initial position and I have to restart the simulation again and again which takes a lot of time. Is there any command available to reset the gazebo world including the models quickly.

Kind regards,.

You can do that by calling the /gazebo/reset_world service

ros2 service call /gazebo/reset_world std_srvs/srv/Empty "{}"

It shows some error. tells to specify service type. Please check the screenshot below

I have corrected the command. Sorry for the miss.

Hello, thanks for the above solution, also I am facing another issue saying python: command not found. I want to run python files directly as part of basic python rosject. How to make python programs run withoput this error. Kind regards,