from random import randint
from kivy.uix.boxlayout import BoxLayout


class RanNum(BoxLayout):
    pass

    def generate_random_number(self):
        try:
            upper_boundary = int(self.ids.upper_boundary_input.text)
            self.ids.output.text = str(randint(1, upper_boundary))
        except ValueError:
            self.ids.output.text = 'Bitte nur positive,\nganze Zahlen eingeben!'