Я хочу создать флажок на киви

Question

Я хочу создать флажок в моем приложении kivy.

Я хочу создать флажок, который при установке флажка изменит результат функции.

import random

from kivy.app import App
from kivy.properties import ObjectProperty
from kivy.uix.widget import Widget
from kivy.uix.checkbox import CheckBox


class MyGrid(Widget):
    inimigos = ObjectProperty(None)

    def Gerar(self):

        self.show_inimigos.text = ""

        int_inimigos = int(self.inimigos.text)


        tipo = ["NEUTRO", "HOSTIL", "ALIADO"]
        racas = ["HUMANO", "ELFO", "ANÃO", "HOBBIT", "VIASHINO", "LEONINO", "NEZUMI", "GOBLIN", "NAGA"]
        classe = ["FIGHTER", "KNIGHT", "BERSERKER", "FENCER", "NINJA", "HOPLITE", "BEAST TAMER",
                  "DRAGON TAMER", "ARCHER", "ROUGE", "DOLL MASTER", "WARLOCK", "MAGE", "ACOLYTE", "MONK", "CLERIC",
                  "BARD", "WARLORD", "SHAMAN", "DRUID", "SPEAKER", "MERCHANT", "ALCHEMIST", "BLACKSMITH", "CHEF"]
        elemento = ["FIRE", "AIR", "WATER", "EARTH", "LIGHT", "DARK"]

        for i in range(int_inimigos):
            escolha_tipo = random.choice(tipo)
            escolha_raca = random.choice(racas)
            escolha_classe = random.choice(classe)
            escolha_elemento = random.choice(elemento)
            encontro = (escolha_raca + ' : ' + escolha_classe + '  -  ' + escolha_elemento)

            self.tipo.text = "ENCONTRO: " + escolha_tipo
            if escolha_tipo == "ALIADO":
                self.tipo.color = 0.2, 0.7, 0.2, 1
            elif escolha_tipo == "NEUTRO":
                self.tipo.color = 0.5, 0.5, 0.5, 1
            elif escolha_tipo == "HOSTIL":
                self.tipo.color = 0.7, 0.2, 0.2, 1
            self.show_inimigos.text += encontro + "\n\n"


class My1App(App):
    def build(self):
        return MyGrid()


if __name__ == "__main__":
    My1App().run()

thisмой код kv

<MyGrid>:
    inimigos: inimigos
    show_inimigos: show_inimigos
    tipo: tipo

    GridLayout:
        cols: 1
        size: root.width, root.height

        GridLayout:
            cols: 2


            Label:
                text: "Numero de inimigos"
                font_size: 20
                size_hint: 1,0.2

            TextInput:
                id: inimigos
                multiline: False
                size_hint: 1,0.2

            GridLayout:
                cols: 1

                Label:
                    text: "Racas para o encontro"

            GridLayout:
                cols: 2
                size_hint: 1, 0.2

                Label:
                    text: "Humano"
                Checkbox:
                Label:
                    text: "Elfo"
                Checkbox:
                Label:
                    text: "Anao"
                Checkbox:
                Label:
                    text: "Orc"
                Checkbox:
                Label:
                    text: "Hobbit"
                Checkbox:
                Label:
                    text: "Nezumi"
                Checkbox:
                Label:
                    text: "Leonino"
                Checkbox:
                Label:
                    text: "Goblin"
                Checkbox:
                Label:
                    text: "Naga"
        Button:
            text: "Gerar"
            size_hint: 1, 0.1
            font_size: 20
            on_press:
                root.Gerar()

        Label:
            id: tipo
            text: "Tipo de encontro"
            size_hint: 1,0.2
            font_size: 20

        Label:
            id: show_inimigos
            text: "Clique para gerar"

Что я могу сделать, чтобы этот код работал?