It does not matter if the function you call is in the same program or a different file. They all operate like the following code See http://www.tutorialspoint.com/python/pyt...ctions.htm
def initialization(i1, s1): ##global i1 ##global s1 i1 = 10 s1 = "10.10.10.10" print ("file_1.py Initialization(): i1 = " + str(i1) + ", s1 = " + str(s1)) return i1, s1