Python tkinter 正在加载

Question

我想知道如何在按下执行按钮后加载最终文本时显示文本“正在加载”？

import time
import random
import tkinter as tk


def load():
    my_label.config(text="Loading in progress...")  #how to display it?
    my_time = random.randint(1,10)
    time.sleep(my_time)
    my_label.config(text="Loaded!!!")

root = tk.Tk()
root.geometry('300x300')

my_button = tk.Button(root, text='Load', width=20, command=load)
my_button.pack(pady=20)

my_label = tk.Label(root, text='')
my_label.pack(pady=20)


root.mainloop()

谢谢您的回答

Answer 1

在 tkinter 中使用 .after 代替 sleep 以避免阻塞主循环。

import time
import random
import tkinter as tk
from functools import partial

my_time = None

def load(my_time):
    if my_time is None:
        my_time = random.randint(2, 10)
    my_label.config(text=f"Loading in progress...{my_time}")
    my_time -=1
    timer = root.after(1000, load, my_time)
    if not my_time:
        root.after_cancel(timer)
        my_label.config(text="Loaded!!!")


root = tk.Tk()
root.geometry('300x300')

my_button = tk.Button(root, text='Load', width=20, command=partial(load, my_time))
my_button.pack(pady=20)

my_label = tk.Label(root, text='')
my_label.pack(pady=20)

root.mainloop()