Tkinter: how to bind scale hotkeys?

Question

I'd like to bind Control+MouseWheelUp combination. I tried to do so:

import tkinter as tk

root = tk.Tk()
root.bind('<Control-Button-4>',print)

This gives no reaction? Why?

Answer 1

Use <MouseWheel> to bind the mouse wheel:

import tkinter as tk

root = tk.Tk()
root.bind('<Control-MouseWheel>', lambda e: print('f'))

root.mainloop()