How to use the textfsm.parser.CopyableRegexObject function in textfsm

def __copy__(self):
    return CopyableRegexObject(self.pattern)

else:
      self.match = line

    # Replace ${varname} entries.
    self.regex = self.match
    if var_map:
      try:
        self.regex = string.Template(self.match).substitute(var_map)
      except (ValueError, KeyError):
        raise TextFSMTemplateError(
            "Duplicate or invalid variable substitution: '%s'. Line: %s." %
            (self.match, self.line_num))

    try:
      # Work around a regression in Python 2.6 that makes RE Objects uncopyable.
      self.regex_obj = CopyableRegexObject(self.regex)
    except re.error:
      raise TextFSMTemplateError(
          "Invalid regular expression: '%s'. Line: %s." %
          (self.regex, self.line_num))

    # No '->' present, so done.
    if not match_action:
      return

    # Attempt to match line.record operation.
    action_re = self.ACTION_RE.match(match_action.group('action'))
    if not action_re:
      # Attempt to match record operation.
      action_re = self.ACTION2_RE.match(match_action.group('action'))
      if not action_re:
        # Math implicit defaults with an optional new state.