Python Kivy: Update Label

i am new in the Kivy Topic and i have got a simple question (i think). With the function 'zufall' i create a random number. This number should update every 2 seconds in the label.

Solution 1:

Firstly you have to return your random number from your zufall function, and call that function from your __init__ like this:

    # runs on initialization
    def zufall(self, *args):
        random_number = random.randrange(10)
        random_number = str(random_number)
        return random_number

    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.cols = 2  # used for our grid
        self.add_widget(Label(text='OEE'))
        self.add_widget(Label(text=self.zufall()))