gistfile1.py

#!/usr/bin/python

import sys,random

if (len(sys.argv) != 5):
	print "Args: every input train test"
	sys.exit(-1)

selectevery = int(sys.argv[1])
inputfile = open(sys.argv[2], 'r')
trainfile = open(sys.argv[3], 'w')
testfile = open(sys.argv[4], 'w')

for line in inputfile:
	if (line != "\n"):
		if (random.randint(1,selectevery) == 1):
			testfile.write(line)
		else:
			trainfile.write(line)

inputfile.close()
trainfile.close()
testfile.close()