TKInter 键绑定：如何防止默认 GUI 导航行为？

Question

在 Tkinter 中，当绑定到也用于导航的键（如 <Tab> 或 <space>）时，如何覆盖键盘导航的默认行为？MWE 重现问题：

import tkinter
root = tkinter.Tk()

def tab():
    print("Tab was pressed")

def space():
    print("space was pressed")

A = tkinter.Button(root, text ="A")
A.pack()
B = tkinter.Button(root, text ="B")
B.pack()

root.bind("<Tab>", lambda x: tab())
root.bind("<space>", lambda x: space())

root.mainloop()

Answer 1

为了防止默认行为，您的函数必须返回字符串“break”

def tab():
    print("Tab was pressed")
    return "break"

def space():
    print("space was pressed")
    return "break"