Creating an app (and its snap) from the scratch | python | hello world

hi guys, if you’d seen my other thread, you’d know that I’ve been struggling to get it to work since a couple of days. I’ve gone through all the tutorials and all of them explain how to build a snap using a pre-built app (such as youtube-dl, offlineimap etc). I am looking to understand how would I pack and snap a simple “” file which simply prints it.