text: from urllib.error import HTTPError
  
  
  class NotFound(HTTPError):
  
      def __init__(self, parent=None, url=None, msg=None):
          if parent is not None:
              super().__init__(parent.url, parent.code, parent.msg, parent.hdrs,
                               parent.fp)
          else:
              super().__init__(url, '404', msg, None, None)
  