python - How to restart Kivy Animation

Question

I am trying to create a simple countdown timer, i want to be able to restart it on the Button click, right now it won't start other, i just can not get it right. What am i missing here?

the KV

<RootWidget>:
    #:import randint  random.randint
    orientation: "vertical"
    CountDownLbl:
        id: anim_label
        text: "{0:.3f}".format(float(self.startCount - self.angle / 360))
        font_size: 30
        canvas:
            Color:
                rgb: 0,1,0
            Line:
                circle:self.center_x, self.center_y, 90, 0, self.angle % 360
                width: 30
    Button:
        size_hint_y: 0.1
        text: "Start"
        on_press: anim_label.start()

and the code

COUNT=1

class RootWidget(FloatLayout):
    pass

class CountDownLbl(Label):
    startCount = COUNT
    angle = NumericProperty(0)

    def __init__(self, **kwargs):
        super(CountDownLbl, self).__init__(**kwargs)

    def start(self):
        self.startCount = COUNT
        self.anim = Animation(angle=360 * self.startCount,  duration=self.startCount)
        self.in_progress = True
        self.anim.start(self)

class TestApp(App):
    def build(self):
        return RootWidget()

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

Answer 1

The problem is that the first animation animates the angle property to 360, and further animations try to animate the angle property to 360 again, which results in no actual animation. The fix is to increment your COUNT after each animation, like this:

def start(self):
    global COUNT
    self.startCount = COUNT
    self.anim = Animation(angle=360 * self.startCount,  duration=self.startCount)
    self.in_progress = True
    self.anim.start(self)
    COUNT += 1