def __missing__(self, key):
        if self.default_factory is None:
            raise KeyError(key)
        else:
            ret = self[key] = self.default_factory(name=key)
            return ret
def limitStrLessThen128Char(self, strStr=None):
        if len(strStr) > 128:
            logging.info("limit str less then 128 char")
            return strStr[:127] + u"_"
        else:
            return strStr