Kivymd full app

from kivymd.app import MDApp
from kivymd.uix.screen import Screen
from kivy.lang import Builder

# Create a function that will build the main_kv.kv file


def build_main_kv():
    main_kv = Builder.load_file("main_kv.kv")
    return main_kv


# Create a class that will hold the app's widgets and functions
class KivyMDApp(MDApp):
    # Define the function that will be called at the start of the app
    def build(self):
        # return the main_kv file that has your widgets
        return build_main_kv()


# Run the app
if __name__ == "__main__":
    KivyMDApp().run()