EDIT: The script has been updated a few times. It now has new features. You should check it out again, even if you already have.
exactly what is says on the can. put in the multireddit URL of all your subs (explained in script), get a list of lemmy communities of the same name.
I would recommend making a full git repository and at least adding a license header so that others can expand upon it. Maintaining a useful gist is cumbersome as issues tend to be ignored comments.