How to remove a keybind after it has done its job

I created a keybind, and want to delete it after it is activated. How do I do this?

I have tried this in my code:

def testing(event):
    print("Hello!")

root.bind_all('<Key>', testing)
root.deletecommand('<Key>', testing)

However, this does not work, as Python displays an error message stating that deletecommand() takes 2 positional arguments but 3 were given, when I only gave two arguments. I also tried root.delete('<Key>', testing), but this also fails.

from tkinter import *

def testing(event):
    print("Hello!")

root.bind_all('<Key>', testing)
root.deletecommand('<Key>', testing)

root.pack()
root.mainloop()

I was hoping that the program would remove the keybind after it did its job. However, Python displayed an error message, as mentioned before. How do I fix this problem?

Answer

try as this

from tkinter import *
root = Tk()


def testing(event):
    print("Hello!")
    root.unbind_all('<Key>')


root.bind_all('<Key>', testing)
root.mainloop()

For unbind all the widget use the function .unbind_all('<Key>').