小编Air*_* jr的帖子

教程.py :

import kivy
kivy.require('1.9.0')

from kivy.app import App
from kivy.uix.widget import Widget

class CustomWidget(Widget):
    pass

class CustomWidgetApp(App):
    def build(self):
        return CustomWidget()

customwidget = CustomWidgetApp()
customwidget.run()

customwidget.kv：

<CustButton@Button>:
    font_size: 32
    color: 0, 0, 0, 1
    size: 150, 50
    background_normal: ''
    background_down: 'bt-down.png'
    background_color: .88, .88, .88, 1

    <CustomWidget>:
        CustButton:
            text: "Random"
            pos: root.x, 200

        CustButton:
            text: "Buttom"
            pos: 200, root.y

        CustButton:
            text: "Buttom"
            pos: 200, 400

我运行此代码并立即收到此错误：

 ...
       7:    background_color: .88, .88, .88, 1
       8:
 >>    9:    <CustomWidget>:
      10: …