kivy file import

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty

class UiWidget(BoxLayout):
    myCustomWidget = ObjectProperty(None)
    pass

class KvFileImportApp(App):
    def build(self):
        return UiWidget()

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

来自为知笔记(Wiz)