We have different definitions here. As poster above said, in the limit it's just "import minecraft". I'd then argue after e.g. Paul Graham in "On Lisp" that you

We have different definitions here. As poster above said, in the limit it's just "import minecraft". I'd then argue after e.g. Paul Graham in "On Lisp" that you're modifying language when you're adding new facilities - like functions - to it. That allows you to much easier solve your problem - in the language which you created for that, rather than in the original language. In this example a lot was done in the external library which was imported. The rest is a little bit of Python with crucial use of those facilities offered by imported library. So I'd say it's not Python - by much - which this program is written on. But that's just a definition - I find it useful to define it this way, but it's certainly not the only possibility.