Can I configure Droplet to automatically restart python app service when I update *.py file?

I am running a Python app on my droplet, with Flask, Gunicorn, Nginx talking to PostgreSQL hosted cluster, all on DO platform. I set it up by following this tutorial: https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-gunicorn-and-nginx-on-ubuntu-20-04

Now, every time I update the app’s main file (e.g., myproject.py), I also have to restart the web service with this command in terminal or console:

systemctl reload-or-restart myproject.service

It works but I’d love to make the restart happen automatically whenever I save the file(s). I know this can be done for HTML templates with an “auto-reload” setting in the .py file, but restarting the whole service seems like it needs to happen at a higher level, like a bash script or something. Any suggestions? Thanks.