python kivy ボタンの表示

''' button sample '''
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout


class MyApp(App):
    """
    MyApp here
        :param App:
    """

    def build(self):
        """
        build here
            :param self:
        """
        layout = BoxLayout()
        layout.size_hint = (1, 1)

        btn = Button()
        btn.text = 'btn'
        btn.color = (1, .5, .5, 1)

        btn2 = Button()
        btn2.text = 'btn2'
        btn2.disabled = True
        btn2.background_color = (10, 5, 5, 1)

        btn3 = Button()
        btn3.size_hint = (.5, .5)
        btn3.text = 'btn3'

        layout.add_widget(btn)
        layout.add_widget(btn2)
        layout.add_widget(btn3)

        return layout


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