code: def get_meta_content(self, metaName):
          
          meta = self.parser.css_select(self.article.doc, metaName)
          content = None
  
          if meta is not None and len(meta) > 0:
              content = self.parser.getAttribute(meta[0], 'content')
  
          if content:
              return content.strip()
  
          return ''
docs: \
          Extract a given meta content form document