A zero beginner doesn't need to read ordinary Python code with decorators etc. The beauty of Python as a teaching language is that none of those things are necessary to explain or handwave to write simple apps that just input and print strings and numbers - which is just enough to teach basic concepts like conditionals, loops, functions etc. For bonus points, it even has turtle graphics out of the box, which is an excellent visual explainer for more advanced concepts like recursion.

And when they've learned the basics on toy stuff and want to start writing real-world apps, that is when you explain decorators, generators etc. And yet they don't have to switch to a whole new language - all the basics they've learned still work exactly as they did before.