Tkinter Menu Button Widget Tutorial

Esse vídeo foi perfeito para mim, muito obrigado.

I just cannot thank you enough, I'm working on the backend GUI of my project and this came in very helpful. Thanks mate 👍

Why use:
def _init_ (self, master):
self.master = root

Why not:
def _init_ (self, master):
self.master = master

I know what you use works but is it the right way? I'm still new at Tkinter/Python and just want to understand.