point script to directory with mismatched filenames, it should clean them up a bit

clean tv series filenames.py

#!/usr/bin/python26
import os,re,sys
from pprint import pprint
expressions = ["(?P<title>[a-zA-Z0-9\-.]+)\.[sS ](?P<season>[0-9]+)[eE ](?P<episode>[0-9]+)\.(?P<rest>[a-zA-Z0-9.()\-\[\] ]*)\.avi",
                "(?P<title>[a-zA-Z0-9\-.]+)\.(?P<season>[0-9]+)(?P<episode>[0-9]{2})\.(?P<rest>[a-zA-Z0-9.()\-\[\] ]*)\.avi",
                "(?P<title>[a-zA-Z0-9\-.]+)[ _]*[-. ][_ ]*(?P<season>[0-9]+)x(?P<episode>[0-9]{2})[ ]*[-.][ ]*(?P<rest>[a-zA-Z0-9.()\-\[\] ]*)\.avi"]
expressions = expressions + [e.replace("avi","srt") for e in expressions] + [e.replace("avi","mkv") for e in expressions] 
compiledExpressions= [re.compile(e) for e in expressions]

if len(sys.argv) > 1:
    directory = sys.argv[1]
else:
    directory = "lost"
    
title = None
if len(sys.argv) > 2:
    title = sys.argv[2]

print "using %s as directory" % directory,

if title:
    print " and %s as title"  % title
else:
    print

fileFormat = "%(title)s.S%(season).2dE%(episode).2d%(rest)s%(extension)s"
rename = True

for file in [f for f in os.listdir(directory) if f.endswith("avi") or f.endswith("srt") or f.endswith("mkv")]:
    print file
    for exp in compiledExpressions:
        match = exp.match(file)
        if not match:
            continue
        match = match.groupdict()
        for k in ["episode","season"]:
            try:
                match[k] = int(match[k])
            except ValueError:
                pass
        match["extension"] = os.path.splitext(file)[-1]
        match["title"] = ".".join([a.capitalize() for a in match["title"].split(".")])
        if not match["rest"].startswith(".") and match["rest"] != "":
            match["rest"] = "."+match["rest"]
        if "season" in match and "episode" in match and "title" in match:
            if title != None:
                match["title"] = title
            newFileName = os.path.join(directory, (fileFormat % match))
            print "Renaming to %s " % newFileName
            if rename:
                os.rename(os.path.join(directory,file),newFileName)
            break