Search a DHCP log file for a list of MAC addresses and print the last (up to) 10 lease times

macreport.py

#!/usr/bin/python
import re 
from sys import argv 


m = open('macs.txt', 'r').read()

log_file = ''
if '-z' in argv: 
  from gzip import open 
	log_file = argv[2]
else: 
	log_file = argv[1] 

macs = m.split('\n')

mac_dict = {}

for mac in macs: 
	mac_dict[mac] = []


log = open(log_file, 'r')

for line in log:
	if re.search('DHCPACK', line): 
		words = line.split(' ')
		if words[9] in macs: 
			mac_dict[words[9]].append(
				"{0} {1},{2}".format(words[0], words[1], words[2])
				)

for k,v in mac_dict.iteritems():
	if len(v) > 10: 
		print "{0}:\n,{1}".format(k, "\n,".join(v[-10:]))
	elif len(v) > 0: 
		print "{0}:\n,{1}".format(k, "\n,".join(v))
	else:
		print "{0}\n,None".format(k)