how to run and get output of a python program from another python program code example

Example 1: run py file in another py file

os.system('python my_file.py')

Example 2: python execute file

import fileB #Replace fileB with the apportite file name
fileB.my_func() #Can replace 'my_fun' with a function from the second .py file
execfile('file.py') #Executes the .py file