Express subtitle translation using Google Translator

fansub.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Express subtitle translation using Google Translator
#
# Notes:
#  - python fansub.py [file] [from language] [to languaje]  // i.e.(python fansub.py mySubs.ass en es)
#  - Only for ASS Subtitle files
#  - Just for fun
#  - Too slow
#  - Translation is very bad in most cases
#  
# (c) 2019  Mauricio Cerón <maw.ceron@gmail.com>
#

import re, sys, os
import urllib, urllib2, HTMLParser

def translation(text, to_lang, from_lang):
    agent = {'User-Agent':"Mozilla/4.0 (compatible;MSIE 6.0;Windows NT 5.1;SV1;.NET CLR 1.1.4322;.NET CLR 2.0.50727;.NET CLR 3.0.04506.30)"}

    base_link = "http://translate.google.com/m?hl=%s&sl=%s&q=%s"
    to_trans = urllib.quote_plus(text)
    link = base_link % (to_lang,from_lang,to_trans)
    req = urllib2.Request(link, headers = agent)
    response = urllib2.urlopen(req).read()

    data = response.decode("utf-8")
    expr = r'class="t0">(.*?)>'
    re_result = re.findall(expr, data)

    if len(re_result) == 0:
        result = ""
    else:
        result = unescape(re_result[0])
    return result.encode('utf-8')

def unescape(text):
    if sys.version_info[0] < 3:
        parser = HTMLParser.HTMLParser()
    else:
        parser = html.parser.HTMLParser()
    return (parser.unescape(text))

def main(argv):
    if len(argv) != 3:
        print("[!] Error. There is not enough information, please enter the information as follows:\n")
        print("[*] python fansub.py [file] [from language] [to languaje]")
    else:
        original_subs = argv[0] # Here goes the path to the subtitles script
        original_lang = argv[1]
        translate_lang = argv[2]
        new_script = []
        with open(original_subtitles) as fp:
            for line in fp:
                line = line.strip()

                if line.startswith('Dialogue:') or line.startswith('Comment:'):
                    event_type, rest = line.split(": ", 1)
                    buf = rest.split(',')
                    dialogue = buf[9]
                    text = buf[9].replace('\N','\n')
                    text = re.sub(r'{.*}','',text)
                    trans = translation(text,translate_lang,original_lang)
                    buf[9] = trans
                    rest = ','.join(buf)
                    new_line = "%s: %s" %(event_type,rest)
                    new_script.append(new_line)
                else
                    new_script.append(line)

        name, ext = os.path.splitext(original_subs)
        translated_subs
        nfp = open(translated_subs, 'w')
        for line in new_script:
            nfp.write("%s\n" %line)

        fp.close()
        nfp.close()

if __name__ == "__main__":
    main(sys.argv[1:])