code: def convert_value(v):
      
      if v and isinstance(v, six.string_types):
          v = v.strip()
          if (v.startswith('{') and v.endswith('}')) or (v.startswith('[') and v.endswith(']')):
              try:
                  return json.loads(v)
              except Exception as e:
                  logger.error(e)
  
      return v
docs: 默认使用Json转化数据,凡以[或{开始的,均载入json
      :param v:
      :return: