Domain 2 IP in Python

domain2ip.py

#!/bin/python
import os
import sys
import datetime
import os.path

if len(sys.argv)!=3:
	print "This script takes two file \n 1. InputFile with hostnames \n 2. OutputFilename \n\n Example: python domain_2_ip.py [INPUT_FILE_NAME] [OUTPUT_FILE_NAME]"
else:
	if os.path.exists(sys.argv[1]):
		print ('Initiating...\n')
		input = open(sys.argv[1], 'r').read().split('\n')
		temp_file = str(datetime.datetime.now().time())+'.txt'
		for domain_name in input[:-1]:
			cmd =  'host ' + domain_name + ' | grep "has address" | cut -d " " -f 4 >>'+temp_file
			os.system(cmd)
		sort_output = 'cat ' + temp_file +' | sort | uniq > '+ sys.argv[2]
		os.system(sort_output)
		print 'Done! Check file : '+sys.argv[2]
	else:
		print "\nInput File Doesn't Exists !!!"