Python for kivy:Pass values between multiple screens -

i developing kivy app in ,there 2 screens 1.loginscreen , 2.homescreen.

what required - value 'xyz' computed in class loginscreen, passed method 'insertdata' of class homescreen , want display value on label.

for tried following code:

#!/usr/bin/env python # -*- coding: utf-8 -*- kivy.app import app kivy.uix.label import label kivy.uix.boxlayout import boxlayout kivy.uix.screenmanager import screen, screenmanager   class loginscreen(screen):     def __init__(self,**kwargs):         super(homescreen, self).__init__(**kwargs)      def auth(self):         xyz=1         self.manager.current="home"         obj=homescreen()         # 1. pass 'xyz' method scrn2          homescreen.insertdata(obj)   class homescreen(screen):      def __init__(self,**kwargs):         super(loginscreen, self).__init__(**kwargs)         if (a==1):             # 2. display label         self.scrn2()      def insertdata(self):         print "screen 2"         label=label(text="good moring")         self.add_widget(label)   class screenapp(app):     pass  if __name__ == '__main__':     screenapp().run() 

here:

• insertdata called method auth

1)the 1st way proper , passing 'xyz' , calling method insertdata dosen't display label

2) in 1st way have create create object of homescreen ,to call insertdata, in turn calls ___init__ of homescreen , init calls insertdata

• insertdata called __init__

1) loads data before user authentication @ loginscreen

insertdata gets total 3 calls, affecting app launch time.

suggest me simple , effective way this. in advance.

you can use screen.manager() method manager object 1 screen, use retrieve 1 screenmanager.get_screen() method , pass value directly. working example check answer of question: kivy - slider class value change on screen