kivy中的网格布局格式

from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.app import App

class MyGrid(GridLayout):
    def __init__(self, **kwargs):
        super(MyGrid, self).__init__(**kwargs)
        self.cols = 3  # 设置网格布局的列数

        # 添加组件到网格布局中
        self.add_widget(Button(text='Button 1'))
        self.add_widget(Button(text='Button 2'))
        self.add_widget(Button(text='Button 3'))
        self.add_widget(Button(text='Button 4'))
        self.add_widget(Button(text='Button 5'))
        self.add_widget(Button(text='Button 6'))

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

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