How to Create Menu in Tkinter in Python: Simple Guide

To create a menu in Tkinter, use the Menu widget and attach it to the root window with root.config(menu=menu_bar). Add menu items using add_command or submenus with add_cascade on the menu bar.

Syntax

Here is the basic syntax to create a menu in Tkinter:

• menu_bar = Menu(root): Create the main menu bar attached to the root window.
• file_menu = Menu(menu_bar, tearoff=0): Create a submenu (like File menu).
• file_menu.add_command(label='Open', command=some_function): Add a clickable menu item.
• menu_bar.add_cascade(label='File', menu=file_menu): Add the submenu to the menu bar.
• root.config(menu=menu_bar): Set the menu bar on the main window.

python

menu_bar = Menu(root)
file_menu = Menu(menu_bar, tearoff=0)
file_menu.add_command(label='Open', command=some_function)
menu_bar.add_cascade(label='File', menu=file_menu)
root.config(menu=menu_bar)

Example

This example creates a window with a menu bar containing a File menu. The File menu has an Exit item that closes the window when clicked.

python

import tkinter as tk
from tkinter import Menu

def exit_app():
    root.destroy()

root = tk.Tk()
root.title('Menu Example')

menu_bar = Menu(root)
file_menu = Menu(menu_bar, tearoff=0)
file_menu.add_command(label='Exit', command=exit_app)
menu_bar.add_cascade(label='File', menu=file_menu)

root.config(menu=menu_bar)
root.mainloop()

Output

A window titled 'Menu Example' opens with a menu bar. Clicking 'File' shows 'Exit'. Clicking 'Exit' closes the window.

Common Pitfalls

Common mistakes when creating menus in Tkinter include:

• Forgetting to attach the menu bar to the root window using root.config(menu=menu_bar), so the menu does not appear.
• Not setting tearoff=0 on submenus, which adds a dashed line that can confuse beginners.
• Using incorrect commands or forgetting to define the function called by command=.

python

import tkinter as tk
from tkinter import Menu

root = tk.Tk()
menu_bar = Menu(root)
file_menu = Menu(menu_bar)  # Missing tearoff=0
file_menu.add_command(label='Exit')  # Missing command
menu_bar.add_cascade(label='File', menu=file_menu)
# Missing root.config(menu=menu_bar)
root.mainloop()

Output

No menu appears because root.config(menu=menu_bar) is missing and Exit does nothing when clicked.

Quick Reference

Summary tips for creating menus in Tkinter:

• Always create a Menu object for the menu bar and submenus.
• Use add_command to add clickable items with a label and command.
• Use add_cascade to add submenus to the menu bar.
• Set tearoff=0 to disable the dashed line on submenus.
• Attach the menu bar to the root window with root.config(menu=menu_bar).

Key Takeaways

Create a Menu object and attach it to the root window with root.config(menu=menu_bar).

Add menu items using add_command with a label and a function to run on click.

Use add_cascade to add submenus to the main menu bar.

Set tearoff=0 on submenus to avoid confusing dashed lines.

Always define functions for menu commands to avoid errors.