I'm getting error for use this script

[Danielab]

hi
I'm getting error for use this code
this code for download from viu.com
I saved in notepad and changed a.txt to a.bat but I can't use this
how can I use this script?

# coding: utf-8
from __future__ import unicode_literals

import re

from .common import InfoExtractor
from ..compat import (
    compat_kwargs,
    compat_str,
)
from ..utils import (
    ExtractorError,
    int_or_none,
)


class ViuBaseIE(InfoExtractor):
    def _real_initialize(self):
        viu_auth_res = self._request_webpage(
            'https://www.viu.com/api/apps/v2/authenticate', None,
            'Requesting Viu auth', query={
                'acct': 'test',
                'appid': 'viu_desktop',
                'fmt': 'json',
                'iid': 'guest',
                'languageid': 'default',
                'platform': 'desktop',
                'userid': 'guest',
                'useridtype': 'guest',
                'ver': '1.0'
            }, headers=self.geo_verification_headers())
        self._auth_token = viu_auth_res.info()['X-VIU-AUTH']

    def _call_api(self, path, *args, **kwargs):
        headers = self.geo_verification_headers()
        headers.update({
            'X-VIU-AUTH': self._auth_token
        })
        headers.update(kwargs.get('headers', {}))
        kwargs['headers'] = headers
        response = self._download_json(
            'https://www.viu.com/api/' + path, *args,
            **compat_kwargs(kwargs))['response']
        if response.get('status') != 'success':
            raise ExtractorError('%s said: %s' % (
                self.IE_NAME, response['message']), expected=True)
        return response


class ViuIE(ViuBaseIE):
    _VALID_URL = r'(?:viu:|https?://[^/]+\.viu\.com/[a-z]{2}/media/)(?P<id>\d+)'
    _TESTS = [{
        'url': 'https://www.viu.com/en/media/1116705532?containerId=playlist-22168059',
        'info_dict': {
            'id': '1116705532',
            'ext': 'mp4',
            'title': 'Citizen Khan - Ep 1',
            'description': 'md5:d7ea1604f49e5ba79c212c551ce2110e',
        },
        'params': {
            'skip_download': 'm3u8 download',
        },
        'skip': 'Geo-restricted to India',
    }, {
        'url': 'https://www.viu.com/en/media/1130599965',
        'info_dict': {
            'id': '1130599965',
            'ext': 'mp4',
            'title': 'Jealousy Incarnate - Episode 1',
            'description': 'md5:d3d82375cab969415d2720b6894361e9',
        },
        'params': {
            'skip_download': 'm3u8 download',
        },
        'skip': 'Geo-restricted to Indonesia',
    }, {
        'url': 'https://india.viu.com/en/media/1126286865',
        'only_matching': True,
    }]

    def _real_extract(self, url):
        video_id = self._match_id(url)

        video_data = self._call_api(
            'clip/load', video_id, 'Downloading video data', query={
                'appid': 'viu_desktop',
                'fmt': 'json',
                'id': video_id
            })['item'][0]

        title = video_data['title']

        m3u8_url = None
        url_path = video_data.get('urlpathd') or video_data.get('urlpath')
        tdirforwhole = video_data.get('tdirforwhole')
        # #EXT-X-BYTERANGE is not supported by native hls downloader
        # and ffmpeg (#10955)
        # hls_file = video_data.get('hlsfile')
        hls_file = video_data.get('jwhlsfile')
        if url_path and tdirforwhole and hls_file:
            m3u8_url = '%s/%s/%s' % (url_path, tdirforwhole, hls_file)
        else:
            # m3u8_url = re.sub(
            #     r'(/hlsc_)[a-z]+(\d+\.m3u8)',
            #     r'\1whe\2', video_data['href'])
            m3u8_url = video_data['href']
        formats = self._extract_m3u8_formats(m3u8_url, video_id, 'mp4')
        self._sort_formats(formats)

        subtitles = {}
        for key, value in video_data.items():
            mobj = re.match(r'^subtitle_(?P<lang>[^_]+)_(?P<ext>(vtt|srt))', key)
            if not mobj:
                continue
            subtitles.setdefault(mobj.group('lang'), []).append({
                'url': value,
                'ext': mobj.group('ext')
            })

        return {
            'id': video_id,
            'title': title,
            'description': video_data.get('description'),
            'series': video_data.get('moviealbumshowname'),
            'episode': title,
            'episode_number': int_or_none(video_data.get('episodeno')),
            'duration': int_or_none(video_data.get('duration')),
            'formats': formats,
            'subtitles': subtitles,
        }


class ViuPlaylistIE(ViuBaseIE):
    IE_NAME = 'viu:playlist'
    _VALID_URL = r'https?://www\.viu\.com/[^/]+/listing/playlist-(?P<id>\d+)'
    _TEST = {
        'url': 'https://www.viu.com/en/listing/playlist-22461380',
        'info_dict': {
            'id': '22461380',
            'title': 'The Good Wife',
        },
        'playlist_count': 16,
        'skip': 'Geo-restricted to Indonesia',
    }

    def _real_extract(self, url):
        playlist_id = self._match_id(url)
        playlist_data = self._call_api(
            'container/load', playlist_id,
            'Downloading playlist info', query={
                'appid': 'viu_desktop',
                'fmt': 'json',
                'id': 'playlist-' + playlist_id
            })['container']

        entries = []
        for item in playlist_data.get('item', []):
            item_id = item.get('id')
            if not item_id:
                continue
            item_id = compat_str(item_id)
            entries.append(self.url_result(
                'viu:' + item_id, 'Viu', item_id))

        return self.playlist_result(
            entries, playlist_id, playlist_data.get('title'))


class ViuOTTIE(InfoExtractor):
    IE_NAME = 'viu:ott'
    _VALID_URL = r'https?://(?:www\.)?viu\.com/ott/(?P<country_code>[a-z]{2})/[a-z]{2}-[a-z]{2}/vod/(?P<id>\d+)'
    _TESTS = [{
        'url': 'http://www.viu.com/ott/sg/en-us/vod/3421/The%20Prime%20Minister%20and%20I',
        'info_dict': {
            'id': '3421',
            'ext': 'mp4',
            'title': 'A New Beginning',
            'description': 'md5:1e7486a619b6399b25ba6a41c0fe5b2c',
        },
        'params': {
            'skip_download': 'm3u8 download',
        },
        'skip': 'Geo-restricted to Singapore',
    }, {
        'url': 'http://www.viu.com/ott/hk/zh-hk/vod/7123/%E5%A4%A7%E4%BA%BA%E5%A5%B3%E5%AD%90',
        'info_dict': {
            'id': '7123',
            'ext': 'mp4',
            'title': '這就是我的生活之道',
            'description': 'md5:4eb0d8b08cf04fcdc6bbbeb16043434f',
        },
        'params': {
            'skip_download': 'm3u8 download',
        },
        'skip': 'Geo-restricted to Hong Kong',
    }]

    _AREA_ID = {
        'HK': 1,
        'SG': 2,
        'TH': 4,
        'PH': 5,
    }

    def _real_extract(self, url):
        country_code, video_id = re.match(self._VALID_URL, url).groups()

        query = {
            'r': 'vod/ajax-detail',
            'platform_flag_label': 'web',
            'product_id': video_id,
        }

        area_id = self._AREA_ID.get(country_code.upper())
        if area_id:
            query['area_id'] = area_id

        product_data = self._download_json(
            'http://www.viu.com/ott/%s/index.php' % country_code, video_id,
            'Downloading video info', query=query)['data']

        video_data = product_data.get('current_product')
        if not video_data:
            raise ExtractorError('This video is not available in your region.', expected=True)

        stream_data = self._download_json(
            'https://d1k2us671qcoau.cloudfront.net/distribute_web_%s.php' % country_code,
            video_id, 'Downloading stream info', query={
                'ccs_product_id': video_data['ccs_product_id'],
            }, headers={
                'Referer': url,
                'Origin': re.search(r'https?://[^/]+', url).group(0),
            })['data']['stream']

        stream_sizes = stream_data.get('size', {})
        formats = []
        for vid_format, stream_url in stream_data.get('url', {}).items():
            height = int_or_none(self._search_regex(
                r's(\d+)p', vid_format, 'height', default=None))
            formats.append({
                'format_id': vid_format,
                'url': stream_url,
                'height': height,
                'ext': 'mp4',
                'filesize': int_or_none(stream_sizes.get(vid_format))
            })
        self._sort_formats(formats)

        subtitles = {}
        for sub in video_data.get('subtitle', []):
            sub_url = sub.get('url')
            if not sub_url:
                continue
            subtitles.setdefault(sub.get('name'), []).append({
                'url': sub_url,
                'ext': 'srt',
            })

        title = video_data['synopsis'].strip()

        return {
            'id': video_id,
            'title': title,
            'description': video_data.get('description'),
            'series': product_data.get('series', {}).get('name'),
            'episode': title,
            'episode_number': int_or_none(video_data.get('number')),
            'duration': int_or_none(stream_data.get('duration')),
            'thumbnail': video_data.get('cover_image_url'),
            'formats': formats,
            'subtitles': subtitles,
        }

[Larz60+]

post error

[Danielab]

post error

what?

[ThiefOfTime]

What Larz60+ meant was that you should post the error that you are receiving while running the .bat file. Though it will not work like that. What you have is python code which has to be placed inside of an <filename>.py file so it can be run by calling python in the console. Converting the file into a batch file like you did will not work. The computer can not interpret what is written in the file, also all imported modules can not be found. But even when you run it with python inside of the console it will not produce any output or do anything since only a few classes are defined inside of the script and nothing more, no executable code. If you want to run it you would have to use the classes by yourself.
I would suggest that you start by looking at the python basics, like how you run python code, and take a look at object oriented programming so that you can use the classes.