如何为 tkinter 中的函数添加键盘快捷键

Question

I did some research in Tkinter and found the root.bind('<Control-Key-whatever key', function).

I wanted to add this to an application I was making.

I made a button and I want it to perform a function when I click a certain key combination.

Here is my code:

from tkinter import *

root = Tk()
root.geometry("600x600")

def printFunction():
    print("Hello World")

root.bind('<Control-Key-v>', printFunction)

button = Button(root, text="click here", command=printFunction)
button.pack()

root.mainloop()

So when I click the button the function should perform, and when I click Ctrl+v the function should perform. The button works fine, but the key combination does not work. How do I fix this?

Answer 1

It should be something like

root.bind('<Control-v>', printFunction)

But keep in mind, this will again throw another error, because you have to pass event as a parameter to the function.

def printFunction(event=None):
    print("Hello World")

Why event=None ? This is because your button is also using the same function as a command but without any arguments passed to it on declaration. So to nullify it, this is a workaround.

Alternatively, your could also pass something like *args instead of event :

def printFunction(*args):
    print("Hello World")

Hope you understood better.

Cheers

Answer 2

You can use

from tkinter import *

root = Tk()
root.geometry("600x600")

def printFunction(event):
    print("Hello World")

button = Button(root, text="click here", command=lambda:printFunction(None))
root.bind('<Control-v>', printFunction)
button.pack()
root.mainloop()

• Argument event is needed for the concerned function
• Event name should be converted to <Control-v>
• Don't forget to add lambda just before the function name call from the button in order to call without issue by any means.