android - How to integrate a python program into a kivy app -

i'm working on app written in python kivy modules develop cross-platform app. within app have form takes numerical values. these numerical values passed python program i've written, used calculate other values, , passed app , returned user. outside program not recognizing values i'm trying pass exist. below sample code 3 files i'm using, 2 app , 1 outside program. apologize abundance of seemingly unused kivy modules being imported, use them in full app.

main.py

import kivy import flowcalc  kivy.app import app kivy.lang import builder kivy.uix.screenmanager import screenmanager, screen kivy.uix.dropdown import dropdown kivy.uix.spinner import spinner kivy.uix.button import button kivy.base import runtouchapp kivy.uix.textinput import textinput kivy.properties import numericproperty, referencelistproperty, objectproperty, listproperty kivy.uix.gridlayout import gridlayout kivy.uix.scrollview import scrollview kivy.core.window import window kivy.uix.slider import slider kivy.uix.scatter import scatter kivy.uix.image import asyncimage kivy.uix.carousel import carousel  builder.load_file('main.kv')  #declare screens  class formscreen(screen):     pass  class resultsscreen(screen):     pass  #create screen manager  sm = screenmanager()  sm.add_widget(formscreen(name = 'form')) sm.add_widget(resultsscreen(name = 'results'))  class testapp(app):     def build(self):         return sm  if __name__ == '__main__':     testapp().run() 

main.kv

<formscreen>:     boxlayout:         orientation: 'vertical'         asyncimage:             source: 'sample.png'             size_hint: 1, none             height: 50         gridlayout:             cols: 2             label:                 text: 'company industry'             label:                 text: 'sample'             label:                 text: 'company name'             textinput:                 id: companyname             label:                 text: 'company location'             textinput:                 id: companylocation               label:                 text: 'data1'             textinput:                 id: data1             label:                 text: 'data2'             textinput:                 id: data2             label:                 text: 'data3'             textinput:                 id: data3         button:              text: 'submit'             size_hint: 1, .1             on_press: root.manager.current = 'results'  <resultsscreen>:     boxlayout:         orientation: 'vertical'         asyncimage:             source: 'sample.png'             size_hint: 1, none             height: 50         label:             text: 'results'             size_hint: 1, .1         gridlayout:             cols: 2             label:                  text: 'results 1'             label:                 text: results1             label:                  text: 'results 2'             label:                 text: results2             label:                  text: 'results 3'             label:                 text: results3             label:                  text: 'results 4'             label:                 text: results4 

otherprogram.py

data1float = float(data1.text)                                                                        data2float = float(data2.text)                                data3float = float(data3.text)  results1 = data1float + data2float results2 = data1float - data3float results3 = data2float * data3float results4 = 10 * data2float           

as far understood want labels in gridlayout in last section of code texts python code. this:

from otherprogram import results1, results2, results3, results4  class resultsscreen(screen):      label1_text = results1     label2_text = results2     label3_text = results3     label4_text = results4 

then in .kv file access these values calling root widgets attribute.

    label:         text: root.label1_text 

and on.