How to use the youtube-dl.youtube_dl.utils.urlencode_postdata function in youtube_dl

return

            fb_dtsg = self._search_regex(
                r'name="fb_dtsg" value="(.+?)"', login_results, 'fb_dtsg', default=None)
            h = self._search_regex(
                r'name="h"\s+(?:\w+="[^"]+"\s+)*?value="([^"]+)"', login_results, 'h', default=None)

            if not fb_dtsg or not h:
                return

            check_form = {
                'fb_dtsg': fb_dtsg,
                'h': h,
                'name_action_selected': 'dont_save',
            }
            check_req = sanitized_Request(self._CHECKPOINT_URL, urlencode_postdata(check_form))
            check_req.add_header('Content-Type', 'application/x-www-form-urlencoded')
            check_response = self._download_webpage(check_req, None,
                                                    note='Confirming login')
            if re.search(r'id="checkpointSubmitButton"', check_response) is not None:
                self._downloader.report_warning('Unable to confirm login, you have to login in your browser and authorize the login.')
        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
            self._downloader.report_warning('unable to log in: %s' % error_to_compat_str(err))
            return

def _login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url):
        action_url = self._search_regex(
            r']+action=(["\'])(?P.+?)\1', form_html,
            'post url', default=fallback_action_url, group='url')

        if not action_url.startswith('http'):
            action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url)

        form_data = self._hidden_inputs(form_html)
        form_data.update(extra_form_data)

        try:
            response = self._download_json(
                action_url, None, note,
                data=urlencode_postdata(form_data),
                headers={
                    'Referer': referrer_url,
                    'X-Requested-With': 'XMLHttpRequest',
                })
        except ExtractorError as e:
            if isinstance(e.cause, compat_HTTPError) and e.cause.code == 500:
                response = self._parse_json(e.cause.read().decode('utf-8'), None)
                self._check_error(response, ('email', 'password'))
            raise

        self._check_error(response, 'ErrorMessage')

        return response, action_url

def _verify_player_video_password(self, url, video_id):
        password = self._downloader.params.get('videopassword')
        if password is None:
            raise ExtractorError('This video is protected by a password, use the --video-password option')
        data = urlencode_postdata({'password': password})
        pass_url = url + '/check-password'
        password_request = sanitized_Request(pass_url, data)
        password_request.add_header('Content-Type', 'application/x-www-form-urlencoded')
        password_request.add_header('Referer', url)
        return self._download_json(
            password_request, video_id,
            'Verifying the password', 'Wrong password')

def _login_list_password(self, page_url, list_id, webpage):
        login_form = self._search_regex(
            r'(?s)]+?id="pw_form"(.*?)',
            webpage, 'login form', default=None)
        if not login_form:
            return webpage

        password = self._downloader.params.get('videopassword')
        if password is None:
            raise ExtractorError('This album is protected by a password, use the --video-password option', expected=True)
        fields = self._hidden_inputs(login_form)
        token, vuid = self._extract_xsrft_and_vuid(webpage)
        fields['token'] = token
        fields['password'] = password
        post = urlencode_postdata(fields)
        password_path = self._search_regex(
            r'action="([^"]+)"', login_form, 'password URL')
        password_url = compat_urlparse.urljoin(page_url, password_path)
        password_request = sanitized_Request(password_url, post)
        password_request.add_header('Content-type', 'application/x-www-form-urlencoded')
        self._set_vimeo_cookie('vuid', vuid)
        self._set_vimeo_cookie('xsrft', token)

        return self._download_webpage(
            password_request, list_id,
            'Verifying the password', 'Wrong password')

for header, cookies in url_handle.headers.items():
            if header.lower() != 'set-cookie':
                continue
            if sys.version_info[0] >= 3:
                cookies = cookies.encode('iso-8859-1')
            cookies = cookies.decode('utf-8')
            remixlhk = re.search(r'remixlhk=(.+?);.*?\bdomain=(.+?)(?:[,;]|$)', cookies)
            if remixlhk:
                value, domain = remixlhk.groups()
                self._set_cookie(domain, 'remixlhk', value)
                break

        login_page = self._download_webpage(
            'https://login.vk.com/?act=login', None,
            note='Logging in',
            data=urlencode_postdata(login_form))

        if re.search(r'onLoginFailed', login_page):
            raise ExtractorError(
                'Unable to login, incorrect username and/or password', expected=True)

url, smuggled_data = unsmuggle_url(url, {})
        show_id, season_id = re.match(self._VALID_URL, url).groups()

        data = {}
        if season_id:
            data['season'] = season_id
            show_id = smuggled_data.get('show_id')
            if show_id is None:
                season = self._download_json(
                    'http://admin.mangomolo.com/analytics/index.php/plus/season_info?id=%s' % season_id,
                    season_id, headers={'Origin': 'http://awaan.ae'})
                show_id = season['id']
        data['show_id'] = show_id
        show = self._download_json(
            'http://admin.mangomolo.com/analytics/index.php/plus/show',
            show_id, data=urlencode_postdata(data), headers={
                'Origin': 'http://awaan.ae',
                'Content-Type': 'application/x-www-form-urlencoded'
            })
        if not season_id:
            season_id = show['default_season']
        for season in show['seasons']:
            if season['id'] == season_id:
                title = season.get('title_en') or season['title_ar']

                entries = []
                for video in show['videos']:
                    video_id = compat_str(video['id'])
                    entries.append(self.url_result(
                        'http://awaan.ae/media/%s' % video_id, 'AWAANVideo', video_id))

                return self.playlist_result(entries, season_id, title)

login_page = self._download_webpage(
            self._LOGIN_URL, None, 'Downloading signin page')

        login_form = self._hidden_inputs(login_page)

        login_form.update({
            'username': username,
            'password': password,
        })

        post_url = urljoin(self._LOGIN_URL, self._search_regex(
            r']+action=(["\'])(?P.+?)\1', login_page,
            'post url', default=self._LOGIN_URL, group='url'))

        response, urlh = self._download_webpage_handle(
            post_url, None, 'Logging in', data=urlencode_postdata(login_form),
            headers={'Referer': self._LOGIN_URL})

        if self._LOGIN_URL in urlh.geturl():
            error = clean_html(get_element_by_class('form-message', response))
            if error:
                raise ExtractorError(
                    'Unable to login: %s' % error, expected=True)
            raise ExtractorError('Unable to log in')