gistfile1.py

import readin
import sys

if len(sys.argv) < 2:
  print "No Input"
else: 
	s = readin.readDataFromFile(sys.argv[1])
	out_dict = {"A":0,"T":0,"C":0,"G":0}
	for i in "ATCG":
    		out_dict[i] = s.count(i)
	print out_dict