[Tkinter] macOS Catalina and Python menu issue

[joe_momma]

the interactive prompt is great for running snippets of code, figuring out problems. With
tkinter it's only good for the basic app a box. All menus need to coded nothing preset, I don't have a mac but I guess it's a default by the operating system. Put your code in a file and run it. Check out elfbot tk menu it's assumes you know how import and you'll need to change the print command it's set up for python 2.7 - I modified the first example

from tkinter import Tk, Menu

root = Tk()

def hello():
    print( "hello!")

# create a toplevel menu
menubar = Menu(root)
menubar.add_command(label="Hello!", command=hello)
menubar.add_command(label="Quit!", command= root.destroy)

# display the menu
root.config(menu=menubar)
root.mainloop()

the link you gave is another problem they created a filedialog in the init and froze the gui. I would recommend guizero to start, it's a tkinter wrapper that is easy to create apps, then tkinter, pyqt5, wx or any other.
you can find it here
best of luck