def adjust_weight(self, stock_code, weight):
        """
        雪球组合调仓, weight 为调整后的仓位比例
        :param stock_code: str 股票代码
        :param weight: float 调整之后的持仓百分比， 0 - 100 之间的浮点数
        """

        stock = self._search_stock_info(stock_code)
        if stock is None:
            raise exceptions.TradeError(u"没有查询要操作的股票信息")
        if stock["flag"] != 1:
            raise exceptions.TradeError(u"未上市、停牌、涨跌停、退市的股票无法操作。")

        # 仓位比例向下取两位数
        weight = round(weight, 2)
        # 获取原有仓位信息
        position_list = self._get_position()

        # 调整后的持仓
        for position in position_list:
            if position["stock_id"] == stock["stock_id"]:
                position["proactive"] = True
                position["weight"] = weight

        if weight != 0 and stock["stock_id"] not in [
            k["stock_id"] for k in position_list
        ]:
            position_list.append(
                {
                    "code": stock["code"],
                    "name": stock["name"],
                    "enName": stock["enName"],
                    "hasexist": stock["hasexist"],
                    "flag": stock["flag"],
                    "type": stock["type"],
                    "current": stock["current"],
                    "chg": stock["chg"],
                    "percent": str(stock["percent"]),
                    "stock_id": stock["stock_id"],
                    "ind_id": stock["ind_id"],
                    "ind_name": stock["ind_name"],
                    "ind_color": stock["ind_color"],
                    "textname": stock["name"],
                    "segment_name": stock["ind_name"],
                    "weight": weight,
                    "url": "/S/" + stock["code"],
                    "proactive": True,
                    "price": str(stock["current"]),
                }
            )

        remain_weight = 100 - sum(i.get("weight") for i in position_list)
        cash = round(remain_weight, 2)
        log.debug("调仓比例:%f, 剩余持仓 :%f", weight, remain_weight)
        data = {
            "cash": cash,
            "holdings": str(json.dumps(position_list)),
            "cube_symbol": str(self.account_config["portfolio_code"]),
            "segment": "true",
            "comment": "",
        }

        try:
            resp = self.s.post(self.config["rebalance_url"], data=data)
        # pylint: disable=broad-except
        except Exception as e:
            log.warning("调仓失败: %s ", e)
            return None
        log.debug("调仓 %s: 持仓比例%d", stock["name"], weight)
        resp_json = json.loads(resp.text)
        if "error_description" in resp_json and resp.status_code != 200:
            log.error("调仓错误: %s", resp_json["error_description"])
            return [
                {
                    "error_no": resp_json["error_code"],
                    "error_info": resp_json["error_description"],
                }
            ]
        log.debug("调仓成功 %s: 持仓比例%d", stock["name"], weight)
        return None
雪球组合调仓, weight 为调整后的仓位比例
        :param stock_code: str 股票代码
        :param weight: float 调整之后的持仓百分比， 0 - 100 之间的浮点数