Clean retina resources and multi-language files (keeping English and Chinese-Simplified)

cln.py

#!/usr/bin/env python2.7

import os, re, sys
from itertools import chain
import shutil as sh

def main(walkingPath=None, cleanPic=True, cleanLang=True, dryrun=False):
	matchPatternlang = re.compile(r'^(?!(?:english|base|en(?=\.)|chinese|zh(?=\.)|zh[-_](?!tw))).+\.lproj$', flags=re.I)
	matchPattern2xp = re.compile(r'^(.+)(@2x)(\.(?:png|bmp|tiff|tif|icns|gif))$', flags=re.I)
	for path, dirs, files in os.walk(walkingPath):
		if cleanLang:
			for d in dirs:
				if matchPatternlang.match(d):
					langdir=os.path.join(path, d)
					try:
						if not dryrun:
							sh.rmtree(langdir)
					except OSError:
						sys.stderr.write('Cannot remove: {0}\n'.format(langdir))
					else:
						print langdir
		if cleanPic:
			for f in files:
				matched = matchPattern2xp.search(f)
				if matched:
					x1p=''.join(chain([path, os.path.sep], (i for c,i in enumerate(matched.groups()) if c in (0, 2))))
					if os.path.exists(x1p):
						removedFile = os.path.join(path, f)
						try:
							if not dryrun:
								os.remove(removedFile)
						except OSError:
							sys.stderr.write('Cannot remove: {0}\n'.format(langdir))
						else:
							print removedFile


if __name__=='__main__':
	from argparse import ArgumentParser
	parser = ArgumentParser()
	parser.add_argument('-p', action='store_true', default=False, dest='pic', help='clean pic')
	parser.add_argument('-l', action='store_true', default=False, dest='lang', help='clean lang')
	parser.add_argument('-d', action='store_true', default=False, dest='dry', help='dry-run')
	parser.add_argument('DIR', default='.', nargs=1, type=str, help='searching dir')
	if sys.argv[1:] == []:
		parser.print_help()
		raise SystemExit
	args = parser.parse_args()
	if not os.path.isdir(args.DIR[0]):
		raise SystemExit('Invalid Directory!')
	if args.pic is False and args.lang is False:
		raise SystemExit('You have to choose one of cleaning types!')
	main(args.DIR[0], args.pic, args.lang, args.dry)