更新 Tkinter 中的标签元素

Question

我有以下代码：

import tkinter
from random import randint
score = 0
window = tkinter.Tk()

def Validate():
    global score
    answer_string = answer.get()
    try:
        answer_value = int(answer_string)
    except ValueError as e:
        print(e)
        return

if answer_value == number1 * number2:
    score -= 1
    print('True')
    q.pack_forget()
else:
    score += 1
    print('False')
i=0
while i==0:
    number1 = randint(1,12)
    number2 = randint(1,12)
    q = tkinter.Label(window, text="What is " + str(number1) + "x" + str(number2) + " ?")
    q.pack()
    answer = tkinter.Entry(window)
    submit = tkinter.Button(window, text = "Submit", command=Validate)
    answer.pack()
    submit.pack()
    window.mainloop()

我试图做的是在每次提出问题时替换 q 中的文本。我想要做的是在验证函数中删除 q ，然后在每次代码循环时重新创建它，但这不起作用。

任何帮助，将不胜感激。

Answer 1

基本上你不需要每次迭代都创建标签，有几种方法可以在 tkinter 中更新标签。

例如：

1.

window = tkinter.Tk()
text = tkinter.StringVar()
text.set('old')
lb = tkinter.Label(window, textvariable=text)
...
text.set('new')

2.

lb = tkinter.Label(window, text="What is " + str(number1) + "x" + str(number2) + " ?")
lb['text'] = 'new'

3.

lb = tkinter.Label(window, text="What is " + str(number1) + "x" + str(number2) + " ?")
lb.config(text='new')