Can piped output be separated to different processes in Python

Question

I wish I understood how to just call up go programs within Python but instead I'm left with this question (so either of these questions can be answered)

When I use:

import sys
site = open(sys.argv[1])
for line in site:
   print line

I get a list of addresses fed into a program, when what I want it to do is each seperately. For Example: let's say file.txt contains:

a.com
b.com
c.com

if I use them in the program like program.py file.txt | goprogram the go program then reads each one of those lines together in one bundle as:

goprogram a.com b.com c.com

whereas what I'm looking for is:

goprogram a.com
goprogram b.com
goprogram c.com

Any help?