Tkinter 显示 Label 不更新

Question

The displayed score on the Tkinter window does not update on each loop. But if you check in the terminal score is been updated

Tk Window does not update

The terminal score has been updated

score = 0

def check():
    global score
    if answered_question[1]['correct_answer'] == 'True':
        score += 1

root = tk.Tk()
root.config(padx=20, pady=20, bg=BLUE_GRAY)

score_board = tk.Label(
    text=f"Score: {score}",
    bg=BLUE_GRAY, fg="white",
    font=('Arial', 10, "normal")
)

check_btn = tk.Button(image=check_img, command=check, highlightthickness=0)

root.mainloop()

Answer 1

You have to update the label explicitly by using either config / configure (same thing), or by binding a tk.StringVar() to your Label 's textvariable parameter

# Option One
def check():
    global score
    if answered_question[1]['correct_answer'] == 'True':
        score += 1
        # update the label
        score_board.configure(text=f'Score: {score}')

or...

# Option Two
def check():
    global score
    if answered_question[1]['correct_answer'] == 'True':
        score += 1
        # update the label
        label_var.set(f'Score: {score}')

...  # code omitted for brevity

label_var = tk.StringVar()  # declare a tk.StringVar to bind to your label

score_board = tk.Label(
    text=f"Score: {score}",
    bg=BLUE_GRAY, fg="white",
    font=('Arial', 10, "normal"),
    textvariable=label_var,  # the label will update whenever this var is 'set'
)