Tkinter 键绑定在 Python 中不起作用

Question

I am trying to make a button that increases money or something, but i am just trying to test it out in another project

This is my code for the button

global counterCheck
counterCheck = 0



def checkClick():
    global counterCheck
    counterCheck += 1
    textClick.config(text=counterCheck)


bttt = Button(root, width=1720, height=600, text="Click Here", command=checkClick)

bttt.bind("<space>", checkClick())
bttt.pack()

Answer 1

There are actually multiple problems with your code. The first one is a common problem , but there is more:

• you execute the function and then bind the result of that function, which is None , to the event; instead, you have to bind the function itself
• also, unlike with Button.command , when a function is called via bind , it will get an parameter, the event that triggered it
• by binding the key to the Button, it will only be registered when the button has focus (eg when pressing Tab until the button is "highlighted")
• and the button already has a binding to be "clicked" when it is focused and Space is pressed, so adding another binding would make it react twice

I actually did not manage to unbind the "press on space-key" action from the Button, so one workaround (besides never giving the button the focus) would be to use a different key, eg Return , and bind that to root or use bind_all so it is bound to all widgets.

def checkClick(*unused): # allow optional unused parameters
    ...

root.bind("<Return>", checkClick) # function itself, no (), root, and Return

After this, there are three ways to trigger the button:

• by clicking it, calling the command
• by focusing it and pressing space, emulating a click
• by pressing the Return key, calling the key event binding