Python Tkinter中“after”方法的问题[重复]

Question

我正在用 Python Tkinter 制作一个记忆游戏。卡片翻转后，我正在使用 after 方法使我的代码中的重置功能延迟一秒钟，然后再将卡片翻转回来。它使函数永远等待。有人可以解释为什么会这样吗？ 我的代码：

from tkinter import *
from random import choice

screen = Tk()
screen.title("Disney Princesses Memory Game")
width = screen.winfo_screenwidth()
height = screen.winfo_screenheight()
screen.geometry("%dx%d" % (width, height))
screen.configure(bg="#e0bce5")

title = Label(screen, text="Memory Game", font=("David", 50, "underline", "bold"), bg="#e0bce5")
title.place(x=400, y=20)

images_list = [
    PhotoImage(file="images/aurora.png"),
    PhotoImage(file="images/belle.png"),
    PhotoImage(file="images/cinderella.png"),
    PhotoImage(file="images/jasmine.png"),
    PhotoImage(file="images/mulan.png"),
    PhotoImage(file="images/rapunzel.png"),
    PhotoImage(file="images/snow white.png"),
    PhotoImage(file="images/tiana.png")
]

buttons_list = []
chosen_images = []
flipped = []
num_list = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
card = PhotoImage(file="images/card.png")
count = 0
no_press = False


def choose_images():
    for num in range(16):
        chosen_image = choice(images_list)
        num_list[num] += 1

        if num_list[num] > 2:
            num += 1
            continue
        else:
            chosen_images.append(chosen_image)


def replace_card(c, d):
    global flipped, count, no_press

    if no_press is True:
        return

    count += 1

    if count > 2:
        count = 0
        no_press = True
        sleep_secs()
    else:
        buttons_list[c][d].configure(image=chosen_images[d])
        flipped.append(buttons_list[c][d])


def reset():
    global card, no_press
    for element in flipped:
        element.configure(image=card)


def sleep_secs():
    global no_press
    screen.after(1000, reset)
    no_press = False


choose_images()
x = 100
y = 250
for i in range(2):
    buttons_list.append([])
    for j in range(8):
        a = Button(screen, image=card, command=lambda i=i, j=j: replace_card(i, j))
        x += 100
        a.place(x=x, y=y)
        buttons_list[i].append(a)
    y += 100
    x = 100

screen.mainloop()

对我来说，after 方法的奇怪之处在于，当我在一个较小的程序中实现它时它起作用了：

from tkinter import *

screen = Tk()
screen.geometry("600x800+30+10")
hi = Label(screen)
hi.place(x=20, y=20)


def reset():
    hi.configure(text="hi", font=("Ariel", 30))


def sleep_secs():
    screen.after(2000, reset)
    print(2)


sleep_secs()
screen.mainloop()

这是怎么回事？

Answer 1

试试异步功能：

from random import randint
import time
import asyncio


async def randn():
   await asyncio.sleep(3)
    return randint(1, 10)