官网：https://remi.readthedocs.io/en/latest/

""" This example shows the possibility to stop the server by App.close() method.
    With multiple_clients, the server will stop as soon as all the clients 
    will disconnect.
"""

import remi.gui as gui
from remi import start, App


class MyApp(App):
    def main(self, name='world'):
        # margin 0px auto allows to center the app to the screen
        wid = gui.VBox(width=300, height=200, margin='0px auto')

        bt = gui.Button('Close App', width=200, height=30)
        bt.style['margin'] = 'auto 50px'
        bt.style['background-color'] = 'red'

        bt.onclick.do(self.on_button_pressed)

        wid.append(bt)
        return wid

    # listener function
    def on_button_pressed(self, _):
        self.close()  # closes the application

    def on_close(self):
        """ Overloading App.on_close event allows to perform some 
             activities before app termination.
        """
        print("I'm going to be closed.")
        super(MyApp, self).on_close()


if __name__ == "__main__":
    start(MyApp)

执行效果：