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kivy-catalog / container_kvs / BoxLayoutContainer.kv

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#:kivy 1.4

BoxLayout:
    orientation: 'vertical'
    padding: 20
    spacing: 10
    Button:
        text: "Button 1"
        size_hint: 1, None
    Button:
        text: "Button 2"
        size_hint: 1, 0.5
    Button:
        text: "Button 3"