将TextInput更改为仅显示Kivy Python的函数

from kivy.app import App
from kivy.uix.textinput import TextInput
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout

class MyBoxLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MyBoxLayout, self).__init__(**kwargs)
        
        self.orientation = 'vertical'
        
        self.text_input = TextInput(multiline=False)
        self.add_widget(self.text_input)
        
        self.label = Label()
        self.add_widget(self.label)

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

    def on_text_change(self, instance, value):
        self.root.label.text = value

    def build(self):
        box_layout = MyBoxLayout()
        box_layout.text_input.bind(text=self.on_text_change)
        return box_layout

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