docs: def qdii(self, min_volume=0):
          """以字典形式返回QDII数据
          :param min_volume:最小交易量，单位万元
          """
          # 添加当前的ctime
          self.__qdii_url = self.__qdii_url.format(ctime=int(time.time()))
          # 请求数据
          rep = requests.get(self.__qdii_url)
          # 获取返回的json字符串
          fundjson = json.loads(rep.text)
          # 格式化返回的json字符串
          data = self.formatjisilujson(fundjson)
          data = {x: y for x, y in data.items() if y["notes"] != "估值有问题"}
          # 过滤小于指定交易量的数据
          if min_volume:
              data = {
                  k: data[k]
                  for k in data
                  if float(data[k]["volume"]) > min_volume
              }
  
          self.__qdii = data
          return self.__qdii