Heuristic to parse IRC logs for humorous content

funnyfinder.py

import os
import re

DIR = ''  # Directory containing chat logs
FILENAMES = ('#python',)  # Substring that chat logs to searched should contain
NICKS = ('tristaneuan',)  # Nicknames expected to be upvoted
LAUGHS = ('[ha]{6,}', '[lo]{6,}', 'lmao', 'lmfao', 'rofl')

fileregex = re.compile('|'.join(FILENAMES))
laughregex = re.compile('|'.join(LAUGHS), flags=re.I)
upregex = re.compile('|'.join(map(lambda x: x + '\+\+', NICKS)))

for filename in os.listdir(DIR):
    if fileregex.search(filename):
        filepath = os.path.join(DIR, filename)
        with open(filepath) as log:
            lines = log.readlines()
        upcount = 0
        last = 0
        for n, line in enumerate(lines):
            if laughregex.search(line):
                print '%s: %d' % (filename, n)
                print ''.join(lines[n-10:n+1])
            if upregex.search(line):
                upcount += 1
                last = n
            if upcount > 2:
                print '%s: %d' % (filename, n)
                print ''.join(lines[n-20:n+1])
                upcount = 0
            if n >= last + 10:
                upcount = 0