Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/arte.py (Python)

Code before:
            'PF', 'PM', 'RE', 'WF', 'YT',
        ),
        # with both of the below 'BE' sometimes works, sometimes doesn't
        'EUR_DE_FR': (
            'AT', 'BL', 'CH', 'DE', 'FR', 'GF', 'GP', 'LI',
            'MC', 'MF', 'MQ', 'NC', 'PF', 'PM', 'RE', 'WF',
            'YT',
        ),
        'SAT': (
            'AD', 'AT', 'AX', 'BG', 'BL', 'CH', 'CY', 'CZ',
            'DE', 'DK', 'EE', 'ES', 'FI', 'FR', 'GB', 'GF',
            'GR', 'HR', 'HU', 'IE', 'IS', 'IT', 'KN', 'LI',
            'LT', 'LU', 'LV', 'MC', 'MF', 'MQ', 'MT', 'NC',
            'NL', 'NO', 'PF', 'PL', 'PM', 'PT', 'RE', 'RO',
            'SE', 'SI', 'SK', 'SM', 'VA', 'WF', 'YT',
        ),
    }

    def _real_extract(self, url):
        mobj = self._match_valid_url(url)
        video_id = mobj.group('id')
        lang = mobj.group('lang') or mobj.group('lang_2')
        langauge_code = self._LANG_MAP.get(lang)

        config = self._download_json(f'{self._API_BASE}/config/{lang}/{video_id}', video_id, headers={
            "x-validated-age": 18
        })

        geoblocking = traverse_obj(config, ('data', 'attributes', 'restriction', 'geoblocking')) or {}
        if geoblocking.get('restrictedArea'):
            raise GeoRestrictedError(f'Video restricted to {geoblocking["code"]!r}',
                                     countries=self._COUNTRIES_MAP.get(geoblocking['code'], ('DE', 'FR')))

        if not traverse_obj(config, ('data', 'attributes', 'rights')):
            # Eg: https://www.arte.tv/de/videos/097407-215-A/28-minuten
            # Eg: https://www.arte.tv/es/videos/104351-002-A/serviteur-du-peuple-1-23
            raise ExtractorError(
                'Video is not available in this language edition of Arte or broadcast rights expired', expected=True)

        formats, subtitles = [], {}
        secondary_formats = []
        for stream in config['data']['attributes']['streams']:
            # official player contains code like `e.get("versions")[0].eStat.ml5`
            stream_version = stream['versions'][0]
            stream_version_code = stream_version['eStat']['ml5']

            lang_pref = -1
            m = self._VERSION_CODE_RE.match(stream_version_code)
            if m:
                lang_pref = int(''.join('01'[x] for x in (
                    m.group('vlang') == langauge_code,      # we prefer voice in the requested language

Review comment (suggestion):
Single quotes
And core code fixes this, but all header values should be strings
```suggestion
            'x-validated-age': '18'
```

Code after:
            'BL', 'DE', 'FR', 'GF', 'GP', 'MF', 'MQ', 'NC',
            'PF', 'PM', 'RE', 'WF', 'YT',
        ),
        # with both of the below 'BE' sometimes works, sometimes doesn't
        'EUR_DE_FR': (
            'AT', 'BL', 'CH', 'DE', 'FR', 'GF', 'GP', 'LI',
            'MC', 'MF', 'MQ', 'NC', 'PF', 'PM', 'RE', 'WF',
            'YT',
        ),
        'SAT': (
            'AD', 'AT', 'AX', 'BG', 'BL', 'CH', 'CY', 'CZ',
            'DE', 'DK', 'EE', 'ES', 'FI', 'FR', 'GB', 'GF',
            'GR', 'HR', 'HU', 'IE', 'IS', 'IT', 'KN', 'LI',
            'LT', 'LU', 'LV', 'MC', 'MF', 'MQ', 'MT', 'NC',
            'NL', 'NO', 'PF', 'PL', 'PM', 'PT', 'RE', 'RO',
            'SE', 'SI', 'SK', 'SM', 'VA', 'WF', 'YT',
        ),
    }

    def _real_extract(self, url):
        mobj = self._match_valid_url(url)
        video_id = mobj.group('id')
        lang = mobj.group('lang') or mobj.group('lang_2')
        langauge_code = self._LANG_MAP.get(lang)

        config = self._download_json(f'{self._API_BASE}/config/{lang}/{video_id}', video_id, headers={
            'x-validated-age': '18'
        })

        geoblocking = traverse_obj(config, ('data', 'attributes', 'restriction', 'geoblocking')) or {}
        if geoblocking.get('restrictedArea'):
            raise GeoRestrictedError(f'Video restricted to {geoblocking["code"]!r}',
                                     countries=self._COUNTRIES_MAP.get(geoblocking['code'], ('DE', 'FR')))

        if not traverse_obj(config, ('data', 'attributes', 'rights')):
            # Eg: https://www.arte.tv/de/videos/097407-215-A/28-minuten
            # Eg: https://www.arte.tv/es/videos/104351-002-A/serviteur-du-peuple-1-23
            raise ExtractorError(
                'Video is not available in this language edition of Arte or broadcast rights expired', expected=True)

        formats, subtitles = [], {}
        secondary_formats = []
        for stream in config['data']['attributes']['streams']:
            # official player contains code like `e.get("versions")[0].eStat.ml5`
            stream_version = stream['versions'][0]
            stream_version_code = stream_version['eStat']['ml5']

            lang_pref = -1
            m = self._VERSION_CODE_RE.match(stream_version_code)
            if m:
                lang_pref = int(''.join('01'[x] for x in (