为什么 .bind() 方法不适用于 Tkinter 中的框架小部件？

Question

This code is an attempt to bind a command to a frame, ie. when the "Escape" key is pressed, the window should be destroyed.

from tkinter import *
from tkinter import ttk

root=Tk()
root.geometry("400x400")

frame1=ttk.Frame(root)
frame1.pack()

def Exit(event):
    root.destroy()

frame1.bind("<Escape>", Exit)

root.mainloop()

if frame1.bind() is replaced by root.bind() , the code works as I would expect it to. Why doesn't what I've written above work?

Answer 1

The bind works, but the event will only trigger if the frame has focus, and by default a frame does not have the keyboard focus.

Try setting the focus with frame1.focus_set()