覆盖 Python Tkinter 中的默认选项卡行为

问题描述：

我正在使用 Tkinter 用 Python 编写一个应用程序来管理我的 GUI.

I am writing an application in Python using Tkinter to manage my GUI.

有一个文本输入框，我试图在其中实现一个自动完成功能，该功能将绑定到 Tab 键.

There is a text entry box on which I am trying to implement an autocompletion function which will bind to the Tab key.

我已将 Tab 键绑定到我的输入框，但是当我按下 Tab 时，程序会尝试在 GUI 元素之间循环.

I have bound the tab key to my entry box, but when I press tab, the program attempts to cycle between GUI elements.

如何覆盖此默认行为，以便 GUI 仅在按键时执行我指定的命令?

How do I override this default behavior so that the GUI will only carry out my specified command on the key press?

答

在事件处理程序结束时返回 'break'.它会中断事件传播.

Return 'break' at the end of your event handler. It interrupts event propagation.

def my_tab_handler(event):
    ... # handle tab event
    return 'break' # interrupts event propagation to default handlers