test_option_container_with_boxes.py

import toga

class StartApp(toga.App):
    def startup(self):
        self.main_window = toga.MainWindow(self.name)
        self.main_window.app = self

        box1 = toga.Box(children=[toga.Label('test')])
        box2 = toga.Box(children=[toga.Label('split_container')])

        main_content = toga.OptionContainer()
        main_content.add('box1', box1)
        main_content.add('box2', box2)

        self.main_window.content = main_content
        self.main_window.show()

def main():
    app = StartApp('OptionContainer Test', 'org.pybee.test')
    app.main_loop()

if __name__ == '__main__':
    main()