import threading
from pathlib import Path
import PySimpleGUI as sg

def compare_files(window, file1, file2):

    global running

    # Compare both files here
    # If you need to update GUI
    # 1. Call following method to generate an event, then
    # 2. Processing that event in your event loop !!!
    # window.write_event_value(event, value)
    pass
    running = False

sg.theme("black")

layout = [
    [sg.Text('选择源A'), sg.Input(key="A"), sg.FileBrowse()],
    [sg.Text('选择源B'), sg.Input(key="B"), sg.FileBrowse()],
    [sg.Button("Compare"), sg.Button("Quit")],
]

window = sg.Window('Title', layout, finalize=True)

running = False
while True:

    event, values = window.read()
    if event in (sg.WINDOW_CLOSED, "Quit"):
        break
    elif event == "Compare" and not running:
        running = True
        file1, file2 = values["A"], values["B"]
        if Path(file1).is_file() and Path(file2).is_file():
            threading.Thread(target=compare_files, args=(window, file1, file2), daemon=True).start()

threading.Event().set()
window.close()Copy

from random import randint
import PySimpleGUI as sg

sg.theme('DarkBlue')

layout = [[sg.Text('', size=(50, 1), relief='sunken', font=('Courier', 11),
    text_color='yellow', background_color='black',key='TEXT')]]
window = sg.Window('Title', layout, finalize=True)
text = window['TEXT']
state = 0
while True:

    event, values = window.read(timeout=100)

    if event == sg.WINDOW_CLOSED:
        break
    elif event == sg.TIMEOUT_KEY:
        state = (state+1)%51
        text.update('█'*state)

window.close()Copy