code: def from_css(Class, csstext, encoding=None, href=None, media=None, title=None, validate=None):
          
          styles = Class()
          cssStyleSheet = cssutils.parseString(csstext, encoding=encoding, href=href, media=media, title=title, validate=validate)
          for rule in cssStyleSheet.cssRules:
              if rule.type==cssutils.css.CSSRule.FONT_FACE_RULE:
                  if styles.get('@font-face') is None: styles['@font-face'] = []
                  styles['@font-face'].append(Class.styleProperties(rule.style))
              
              elif rule.type==cssutils.css.CSSRule.IMPORT_RULE:
                  if styles.get('@import') is None: styles['@import'] = []
                  styles['@import'].append("url(%s)" % rule.href)
  
              elif rule.type==cssutils.css.CSSRule.NAMESPACE_RULE:
                  if styles.get('@namespace') is None: styles['@namespace'] = {}
                  styles['@namespace'][rule.prefix] = rule.namespaceURI
              
              elif rule.type==cssutils.css.CSSRule.MEDIA_RULE:
                  if styles.get('@media') is None: styles['@media'] = []
                  styles['@media'].append(rule.cssText)
              
              elif rule.type==cssutils.css.CSSRule.PAGE_RULE:
                  if styles.get('@page') is None: styles['@page'] = []
                  styles['@page'].append(rule.cssText)
  
              elif rule.type==cssutils.css.CSSRule.STYLE_RULE:
                  for selector in rule.selectorList:
                      sel = selector.selectorText
                      if sel not in styles:
                          styles[sel] = Class.styleProperties(rule.style)
              
              elif rule.type==cssutils.css.CSSRule.CHARSET_RULE:
                  styles['@charset'] = rule.encoding
  
              elif rule.type==cssutils.css.CSSRule.COMMENT:   # comments are thrown away
                  pass
  
              elif rule.type==cssutils.css.CSSRule.VARIABLES_RULE:
                  pass
              
              else:
                  log.warning("Unknown rule type: %r" % rule.cssText)
  
          return styles
docs: parse CSS text into a Styles object, using cssutils