Modern Python Standard Library Cookbook

How to do it...

The tkinter.Menu class allows us to create menus, submenus, actions, and separators. So, it provides everything we might need to create basic menus in our GUI-based application:

import tkinter


def set_menu(window, choices):
    menubar = tkinter.Menu(root)
    window.config(menu=menubar)

    def _set_choices(menu, choices):
        for label, command in choices.items():
            if isinstance(command, dict):
                # Submenu
                submenu = tkinter.Menu(menu)
                menu.add_cascade(label=label, menu=submenu)
                _set_choices(submenu, command)
            elif label == '-' and command == '-':
                # Separator
                menu.add_separator()
            else:
                # Simple choice
                menu.add_command(label=label, command=command)

    _set_choices(menubar, choices)

The set_menu function allows us to create whole menu hierarchies ...