def __init__(self):
self.__list_trader = list() # 交易员实例list
self.__list_user = list() # 期货账户（TD）实例list
self.__list_strategy = list() # 交易策略实例list
self.__DBM = DBManager.DBManger() # 创建数据库连接
self.__md = None # 行情管理实例，MarketManager
