python - Running multiple Kivy apps at same time that communicate with each other - Stack Overflow

import multiprocessing
import subprocess
import shlex  
  
#my kivy code..

def sub_window():
    subprocess.call(shlex.split('python3 test.py'))
if __name__ == '__main__':
    b = multiprocessing.Process(target=sub_window)
    b.start()
    MyApp().run()