无法将热键绑定到具有多个tkinter窗口的脚本

Question

from tkinter 
root = Tk()
second_root = Tk()

label_placeholder = Label(root, text='placeholder').grid(row=1, column=0)
second_label_placeholder = Label(second_root, text='placeholder').grid(row=1, column=0)


def saylol(event):
    print('lol')

def sayrofl(event):
    print('rofl')

root.bind_all('<Return>', saylol)
root.mainloop()

second_root.bind_all('<Control-Key-s>', sayrofl)
second_root.mainloop()

Above is just a simplified dummy version of what I'm trying to accomplish. I've got a function which creates a new instantiation of tkinter for which I wish to bind a few particular hotkeys to specific functions.

Now, the first binding works perfectly fine, the problem is that it seems I'm unable to bind a hotkey to the secondary root window.

So I was wondering if there is a way around this or is it simply something tkinter is unable to do?

Thanks.

Answer 1

You should not have multiple Tk windows. Tkinter simply isn't designed to work that way. Tkinter is designed to have exactly one root window, and one call to mainloop() for the life of the program. You can violate those constraints if you have a solid understanding of how tkinter works, but there's rarely a good reason to do so.

If you need more than the root window, create instances of Toplevel