具有循环的多个python kivy Switch小部件-但只能激活/停用一个

from kivy.app import App
from kivy.uix.switch import Switch
from kivy.uix.boxlayout import BoxLayout

class SwitchBoxLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(SwitchBoxLayout, self).__init__(**kwargs)
        
        self.switches = []  # 存储Switch小部件的列表
        
        for i in range(3):  # 创建3个Switch小部件
            switch = Switch(active=False)
            switch.bind(active=self.switch_callback)  # 绑定回调函数
            self.switches.append(switch)
            self.add_widget(switch)

    def switch_callback(self, switch, value):
        if value:  # 如果当前Switch小部件被激活
            for s in self.switches:
                if s != switch:  # 将除当前Switch小部件外的其他Switch小部件停用
                    s.active = False

class SwitchApp(App):
    def build(self):
        return SwitchBoxLayout()

if __name__ == '__main__':
    SwitchApp().run()