How do I add buttons that are dynamically created in pure python to a kivy layout that is Written in Kivy Language?

Question

My problem is that I need to create a grid of buttons based on a variable number of grid squares, and place them on a grid layout and display them on a screen using the screen m

Answer 1

I hope this example makes it clear for you:

test.kv:

#:kivy 1.9.0
ScreenManager:
    MapScreen:

:
    name: 'map'

    GridLayout:
        id: grid
        cols: 1

main.py:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from kivy.app import App
from kivy.uix.screenmanager import Screen
from kivy.uix.button import Button
from kivy.clock import mainthread

NUMBER_OF_BUTTONS = 5


class MapScreen(Screen):

    @mainthread
    def on_enter(self):
        for i in xrange(NUMBER_OF_BUTTONS):
            button = Button(text="B_" + str(i))
            self.ids.grid.add_widget(button)


class Test(App):
    pass


Test().run()

The @mainthead decorator is needed to slightly delay the function, so the kv file gets scanned first, making the ids list viable.