Kivy file to go with my scrollview code

scrollview.kv

#:kivy 1.0.4
<MyScrollView>:
    canvas:
        Color:
            rgb: 0.5, 0.1, 0.7
        Rectangle:
            pos: self.pos
            size: self.size
    size_hint: None, None
    width: 200
    height: 200
    #pos_hint: {'center_x': 0.5, 'center_y': 0.5}
    #do_scroll_x: False

<MyStackLayout>:
    canvas:
        Color:
            rgb: 0.2, 0.2, 1
        Rectangle:
            pos: self.pos
            size: self.size
    width: 400
    height: 400
    padding: 10
    spacing: 10
    size_hint: None, None

<MyFloatLayout>:
    canvas:
        Color:
            rgb: 0.5, 0.5, 0.5
        Rectangle:
            pos: self.pos
            size: self.size
    size_hint: 1.0, 1.0

<MyLabel>:
#    canvas.before:
#        Color:
#            rgba: 0.9, 0.0, 0.0, 1.0
#        Rectangle:
#            pos: self.pos
#            size: self.size
    size_hint: None, None
    width: 100
    height: 40
    # texture_size: 100, 20
    text_size: 100, 15
    halign: 'left'