我希望仅当在kivy中连续单击两个按钮时才打印文本

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock

class MyBoxLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MyBoxLayout, self).__init__(**kwargs)
        self.orientation = 'vertical'
        self.button1 = Button(text='Button 1', on_release=self.button1_clicked)
        self.button2 = Button(text='Button 2', on_release=self.button2_clicked)
        self.label = Label(text='')
        self.add_widget(self.button1)
        self.add_widget(self.button2)
        self.add_widget(self.label)
        self.button1_clicked_count = 0
        self.button2_clicked_count = 0

    def button1_clicked(self, instance):
        self.button1_clicked_count += 1
        if self.button1_clicked_count == 1:
            Clock.schedule_once(self.reset_clicked_counts, 1)

    def button2_clicked(self, instance):
        if self.button1_clicked_count == 1:
            self.button2_clicked_count += 1
            if self.button2_clicked_count == 1:
                self.label.text = 'Text printed!'
                self.reset_clicked_counts()

    def reset_clicked_counts(self, dt=None):
        self.button1_clicked_count = 0
        self.button2_clicked_count = 0

class MyApp(App):
    def build(self):
        return MyBoxLayout()

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