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


class MyApp(App):
    def main(self):
        # creating a container VBox type, vertical (you can use also HBox or Widget)
        main_container = gui.VBox(width=300, height=200, style={'margin': '0px auto'})

        label = gui.Label("Select a fruit")

        selection_input = gui.SelectionInputWidget(['banana', 'apple', 'pear', 'apricot'], 'banana', 'text')
        selection_input.oninput.do(lambda emitter, value: label.set_text("event oninput: %s"%value))
        main_container.append([label, selection_input])

        # returning the root widget
        return main_container


if __name__ == "__main__":
    # starts the webserver
    start(MyApp, address='0.0.0.0', port=0, start_browser=True, username=None, password=None)

运行效果：