Count Plixer log entries

plixer_log_count.py

from collections import defaultdict
from operator import itemgetter
import sys

FILENAME = sys.argv[1]

class SimpleCounter(defaultdict):
    """ Scrutinizer ships with Python 2.6 and doesn't have the Counter object
        from collections. This is a simple version of it.
    """
    def most_common(self):
        return sorted(self.iteritems(), key=itemgetter(1), reverse=True)

    def pprint(self):
        for k,v in self.most_common():
            print '%-10i %s' % (v,k)

modules = SimpleCounter(int)
levels = SimpleCounter(int)
ips = SimpleCounter(int)

def main():
    with open(FILENAME) as f:
        for line in f:
            fields = line.split()
            module = fields[3]
            level = fields[5]
            ip = fields[7]
            msg_text = fields[8:]

            modules[module] += 1
            levels[level] += 1
            ips[ip] += 1

    print "Modules"
    modules.pprint()
    print
    print "Levels"
    levels.pprint()
    print
    print "IPs"
    ips.pprint()

if __name__ == '__main__':
    main()