如何在 tkinter 中制作一个按钮来计算它被按下的次数？

Question

I've been trying to create a button in tkinter that tracks the amount of times hat it has been clicked but it shows me a syntax error every time I click it.

The way I intend it to work is for it to add one to the counter every time the top button is clicked, and then upon clicking the bottom one, the programme will close and the amount of times the top button has been clicked will be printed.

from tkinter import *

count = 0
def counter():
    count = count + 1
def total():
    print(count)
    exit ()

window = Tk()
window.geometry("175x105")
window.resizable(0, 0)

text=Label(window, text="Click the button.", font=("Times New Roman", 10))
text.pack(padx=3, pady=3)

button=Button(window, text="CLICK HERE", width=12, bg="gray", command=counter)
button.pack(padx=2, pady=2)
button2=Button(window, text="FINISH", width=12, bg="gray", command=total)
button2.pack(padx=2, pady=2)

window.mainloop()

Answer 1

You only have to globalize the variable count inside the counter() function. It will update the value of count every time the function is called.

Like this:

import tkinter as tk

count = 0


def counter():
    global count
    count = count + 1   # you can also use: count += 1


def total():
    print(count)
    exit()


window = tk.Tk()
window.geometry("175x105")
window.resizable(0, 0)

text = tk.Label(window, text="Click the button.", font=("Times New Roman", 10))
text.pack(padx=3, pady=3)

button = tk.Button(window, text="CLICK HERE", width=12, bg="gray", command=counter)
button.pack(padx=2, pady=2)
button2 = tk.Button(window, text="FINISH", width=12, bg="gray", command=total)
button2.pack(padx=2, pady=2)

window.mainloop()