def get_last_depth(self, symbol, _type):
        """
        获取marketdepth
        :param symbol
        :param type: 可选值：{ percent10, step0, step1, step2, step3, step4, step5 }
        :return:
        """
        params = {'symbol': symbol, 'type': _type}

        url = u.MARKET_URL + '/market/depth'

        def _wrapper(_func):
            @wraps(_func)
            def handle():
                _func(http_get_request(url, params))

            return handle

        return _wrapper