How to use the cssutils.stylesheets.MediaList function in cssutils

href
            location of the style sheet to be imported.
        mediaText
            A list of media types for which this style sheet may be used
            as a string
        """
        super(CSSImportRule, self).__init__(parentRule=parentRule,
                                            parentStyleSheet=parentStyleSheet)
        self._atkeyword = u'@import'
        self.hreftype = None
        self._styleSheet = None

        self._href = None
        self.href = href

        self._media = cssutils.stylesheets.MediaList()
        if mediaText:
            self._media.mediaText = mediaText

        self._name = name

        seq = self._tempSeq()
        seq.append(self.href, 'href')
        seq.append(self.media, 'media')
        seq.append(self.name, 'name')
        self._setSeq(seq)
        self._readonly = readonly

- :exc:`~xml.dom.NoModificationAllowedErr`:
              Raised if the rule is readonly.
            - :exc:`~xml.dom.SyntaxErr`:
              Raised if the specified CSS string value has a syntax error and
              is unparsable.
        """
        super(CSSImportRule, self)._setCssText(cssText)
        tokenizer = self._tokenize2(cssText)
        attoken = self._nexttoken(tokenizer, None)
        if self._type(attoken) != self._prods.IMPORT_SYM:
            self._log.error(u'CSSImportRule: No CSSImportRule found: %s' %
                self._valuestr(cssText),
                error=xml.dom.InvalidModificationErr)
        else:
            # save if parse goes wrong
            oldmedia = cssutils.stylesheets.MediaList()
            oldmedia._absorb(self.media)
            
            # for closures: must be a mutable
            new = {'keyword': self._tokenvalue(attoken),
                   'href': None,
                   'hreftype': None,
                   'media': None,
                   'name': None,
                   'wellformed': True
                   }

            def __doname(seq, token):
                # called by _string or _ident
                new['name'] = self._stringtokenvalue(token)
                seq.append(new['name'], 'name')
                return ';'

else:            
            # save if parse goes wrong
            oldMedia = self._media
            oldName = self._name
            oldCssRules = self._cssRules
            
            ok = True

            # media
            mediatokens, end = self._tokensupto2(tokenizer, 
                                                 mediaqueryendonly=True,
                                                 separateEnd=True)        
            if u'{' == self._tokenvalue(end)\
               or self._prods.STRING == self._type(end):
                self.media = cssutils.stylesheets.MediaList(parentRule=self)
                # TODO: remove special case
                self.media.mediaText = mediatokens
                ok = ok and self.media.wellformed
            else:
                ok = False
            
            # name (optional)
            name = None
            nameseq = self._tempSeq()
            if self._prods.STRING == self._type(end):
                name = self._stringtokenvalue(end)
                # TODO: for now comments are lost after name
                nametokens, end = self._tokensupto2(tokenizer, 
                                                    blockstartonly=True,
                                                    separateEnd=True)
                wellformed, expected = self._parse(None,

The ``href`` attribute to assign to the parsed style sheet.
            Used to resolve other urls in the parsed sheet like @import hrefs.
        :param media:
            The ``media`` attribute to assign to the parsed style sheet
            (may be a MediaList, list or a string).
        :param title:
            The ``title`` attribute to assign to the parsed style sheet.
        :returns:
            :class:`~cssutils.css.CSSStyleSheet`.
        """
        self.__parseSetting(True)
        if isinstance(cssText, str):
            cssText = codecs.getdecoder('css')(cssText, encoding=encoding)[0]

        sheet = cssutils.css.CSSStyleSheet(href=href,
                                           media=cssutils.stylesheets.MediaList(media),
                                           title=title)
        sheet._setFetcher(self.__fetcher)
        # tokenizing this ways closes open constructs and adds EOF
        sheet._setCssTextWithEncodingOverride(self.__tokenizer.tokenize(cssText,
                                                                        fullsheet=True),
                                              encodingOverride=encoding)
        self.__parseSetting(False)
        return sheet

href
            location of the style sheet to be imported.
        mediaText
            A list of media types for which this style sheet may be used
            as a string
        """
        super(CSSImportRule, self).__init__(parentRule=parentRule,
                                            parentStyleSheet=parentStyleSheet)
        self._atkeyword = u'@import'
        self.hreftype = None
        self._styleSheet = None

        self._href = None
        self.href = href

        self._media = cssutils.stylesheets.MediaList()
        if mediaText:
            self._media.mediaText = mediaText

        self._name = name

        seq = self._tempSeq()
        seq.append(self.href, 'href')
        seq.append(self.media, 'media')
        seq.append(self.name, 'name')            
        self._setSeq(seq)
        self._readonly = readonly

def __init__(self, mediaText='all', name=None,
                 parentRule=None, parentStyleSheet=None, readonly=False):
        """constructor"""
        super(CSSMediaRule, self).__init__(parentRule=parentRule, 
                                           parentStyleSheet=parentStyleSheet)
        self._atkeyword = u'@media'
        self._media = cssutils.stylesheets.MediaList(mediaText, 
                                                     readonly=readonly)
        self.name = name
        self.cssRules = cssutils.css.cssrulelist.CSSRuleList()
        self._readonly = readonly

def _setMedia(self, media):
        """
        :param media:
            a :class:`~cssutils.stylesheets.MediaList` or string
        """
        self._checkReadonly()
        if isinstance(media, basestring):
            self._media = cssutils.stylesheets.MediaList(mediaText=media, 
                                                         parentRule=self)
        else:
            media._parentRule = self
            self._media = media

def __init__(self, mediaText=None, variables=None, parentRule=None, 
                 parentStyleSheet=None, readonly=False):
        """
        If readonly allows setting of properties in constructor only.
        """
        super(CSSVariablesRule, self).__init__(parentRule=parentRule, 
                                              parentStyleSheet=parentStyleSheet)
        self._atkeyword = u'@variables'
        
        # dummy
        self._media = cssutils.stylesheets.MediaList(mediaText, 
                                                     readonly=readonly)
        
        if variables:
            self.variables = variables
        else: 
            self.variables = CSSVariablesDeclaration(parentRule=self)

        self._readonly = readonly

def __init__(self, mediaText='all', name=None,
                 parentRule=None, parentStyleSheet=None, readonly=False):
        """constructor"""
        super(CSSMediaRule, self).__init__(parentRule=parentRule,
                                           parentStyleSheet=parentStyleSheet)
        self._atkeyword = u'@media'
        self._media = cssutils.stylesheets.MediaList(mediaText,
                                                     readonly=readonly)
        self.name = name
        self.cssRules = cssutils.css.cssrulelist.CSSRuleList()
        self.cssRules.append = self.insertRule
        self.cssRules.extend = self.insertRule
        self.cssRules.__delitem__ == self.deleteRule

        self._readonly = readonly