How to use the pytube.compat.parse_qsl function in pytube

def init(self):
        """Descramble the stream data and build Stream instances.

        The initialization process takes advantage of Python's
        "call-by-reference evaluation," which allows dictionary transforms to
        be applied in-place, instead of holding references to mutations at each
        interstitial step.

        :rtype: None

        """
        logger.info('init started')

        self.vid_info = {k: v for k, v in parse_qsl(self.vid_info)}
        if self.age_restricted:
            self.player_config_args = self.vid_info
        else:
            self.player_config_args = extract.get_ytplayer_config(
                self.watch_html,
            )['args']

            # Fix for KeyError: 'title' issue #434
            if 'title' not in self.player_config_args:
                i_start = (
                    self.watch_html
                    .lower()
                    .index('<title>') + len('&lt;title&gt;')
                )
                i_end = self.watch_html.lower().index('</title>')
                title = self.watch_html[i_start:i_end].strip()

:param dict dct:
        Dictionary containing query string encoded values.
    :param str key:
        Name of the key in dictionary.

    **Example**:

    >>> d = {'foo': 'bar=1&var=test,em=5&t=url%20encoded'}
    >>> apply_descrambler(d, 'foo')
    >>> print(d)
    {'foo': [{'bar': '1', 'var': 'test'}, {'em': '5', 't': 'url encoded'}]}

    """
    stream_data[key] = [
        {k: unquote(v) for k, v in parse_qsl(i)}
        for i in stream_data[key].split(',')
    ]
    logger.debug(
        'applying descrambler\n%s',
        pprint.pformat(stream_data[key], indent=2),
    )

>>> d = {'foo': 'bar=1&var=test,em=5&t=url%20encoded'}
	>>> apply_descrambler(d, 'foo')
	>>> print(d)
	{'foo': [{'bar': '1', 'var': 'test'}, {'em': '5', 't': 'url encoded'}]}

	"""
	if key == 'url_encoded_fmt_stream_map' and not stream_data.get('url_encoded_fmt_stream_map'):
		formats = json.loads(stream_data['player_response'])['streamingData']['formats']
		formats.extend(json.loads(stream_data['player_response'])['streamingData']['adaptiveFormats'])
		stream_data[key] = [{u'url': format_item[u'url'],
							 u'type': format_item[u'mimeType'],
							 u'quality': format_item[u'quality'],
							 u'itag': format_item[u'itag']} for format_item in formats]
	else:
		stream_data[key] = [
			{k: unquote(v) for k, v in parse_qsl(i)}
			for i in stream_data[key].split(',')
		]
		
	PLog(
		'applying descrambler\n%s')
		# 14.05.2020 für Addon nicht benötigt:

def init(self):
        """Descramble the stream data and build Stream instances.

        The initialization process takes advantage of Python's
        "call-by-reference evaluation," which allows dictionary transforms to
        be applied in-place, instead of holding references to mutations at each
        interstitial step.

        :rtype: None

        """
        logger.info('init started')

        self.vid_info = {k: v for k, v in parse_qsl(self.vid_info)}
        if self.age_restricted:
            self.player_config_args = self.vid_info
        else:
            self.player_config_args = extract.get_ytplayer_config(
                self.watch_html,
            )['args']

        self.vid_descr = extract.get_vid_descr(self.watch_html)
        # https://github.com/nficano/pytube/issues/165
        stream_maps = ['url_encoded_fmt_stream_map']
        if 'adaptive_fmts' in self.player_config_args:
            stream_maps.append('adaptive_fmts')

        # unscramble the progressive and adaptive stream manifests.
        for fmt in stream_maps:
            if not self.age_restricted and fmt in self.vid_info:

def init(self):
		"""Descramble the stream data and build Stream instances.

		The initialization process takes advantage of Python's
		"call-by-reference evaluation," which allows dictionary transforms to
		be applied in-place, instead of holding references to mutations at each
		interstitial step.

		:rtype: None

		"""
		PLog('init YouTube started')

		self.vid_info = {k: v for k, v in parse_qsl(self.vid_info)}
		if self.age_restricted:
			self.player_config_args = self.vid_info
		else:
			self.player_config_args = extract.get_ytplayer_config(
				self.watch_html,
			)['args']

			# Fix for KeyError: 'title' issue #434
			if 'title' not in self.player_config_args:
				i_start = (
					self.watch_html
					.lower()
					.index('<title>') + len('&lt;title&gt;')
				)
				i_end = self.watch_html.lower().index('</title>')
				title = self.watch_html[i_start:i_end].strip()