如何在Kivy，python中创建Button的子类

Question

I have created a button subclass myButt using the method "@". But every time interpreter showing error. I am new to Kivy and have some basic knowledge of python. Please help.

<myButt@ToggleButton>:
    color: .8,.9,0,1
    font_size: 20
    background_color: 0,1,1,1
    group: 'a'

<simpleLayout>:
    padding: 10
    spacing: 10
    myButt:
        text: 'Hello'
        pos_hint: {'x': 0, 'y': 0}
        size_hint: 0.7, 0.5
    myButt:
        text: 'World!'
        pos_hint: {'top': 1, 'right': 1}
        size_hint: 0.3, 0.5

But it showing error: line 15 text: 'World!' ^ SyntaxError: invalid syntax

Answer 1

Reason

Dynamic class cannot start with lower case letter.

Solution

Replace myButt with MyButt

Output