Иван Михайлов

#-*- coding: utf-8 -*-

from kivy.app import App

from kivy.uix.button import Button
from kivy.uix.widget import Widget
from kivy.uix.label import Label
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.boxlayout import BoxLayout

class myApp(App):
    
    def build(self):
        
        gl = BoxLayout(orientation = "vertical", padding=[200, 100], spacing=30)
        self.lbl = Label(text = 'привет ты мальчик?', font_size = 50)
        gl.add_widget(self.lbl)
        gl.add_widget(Button(text = 'да', font_size = 30, background_color = [.32,.85,.94,1], on_press=self.update_label))
        gl.add_widget(Button(text = 'нет', font_size = 30, background_color = [1 ,0 ,0, 1]))
        
        return gl
    
    def update_label(self, instance):
        self.lbl.text = "Привет МАЛЬЧИК"



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

слово сделай с маленькой буквы. "Lexer = PythonLexer()" =>"lexer = PythonLexer()"

BoxLayout вертикальный воткни там, где кнопки.

Из документации (https://kivy.org/docs/api-kivy.uix.boxlayout.html#...

layout = BoxLayout(orientation='vertical')
btn1 = Button(text='Hello')
btn2 = Button(text='World')
layout.add_widget(btn1)
layout.add_widget(btn2)

for x in items.get('razdely'):
            item = AccordionItem(title=x.get("text"))
            #~ item.add_widget(Button(text="Кнопка N1"))
            #~ item.add_widget(Button(text="Кнопка N2"))
            #~ item.add_widget(layout)
            layout = BoxLayout(orientation='vertical')
            btn1 = Button(text='Hello')
            btn2 = Button(text='World')
            layout.add_widget(btn1)
            layout.add_widget(btn2)
            item.add_widget(layout)
            root.add_widget(item)