new_contents: from flask_table import Table, Col
  
  
  class RawCol(Col):
      """Class that will just output whatever it is given and will not
      escape it.
      """
  
      def td_format(self, content):
          return content
  
  
  class ItemTable(Table):
      name = Col('Name')
      raw = RawCol('Raw')
  
  
  def main():
      items = [{'name': 'A', 'raw': '<span>a</span>'},
               {'name': 'B', 'raw': '<span>b</span>'}]
  
      tab = ItemTable(items)
  
      # or {{ tab }} in jinja
      print(tab.__html__())
  
  if __name__ == '__main__':
      main()
  
subject: Add subclassing example for RawCol