code: def QA_fetch_get_exchangerate_list(ip=None, port=None):
      
      global extension_market_list
      extension_market_list = QA_fetch_get_extensionmarket_list(
      ) if extension_market_list is None else extension_market_list
  
      return extension_market_list.query('market==10 or market==11').query('category==4')
docs: 汇率列表
  
      Keyword Arguments:
          ip {[type]} -- [description] (default: {None})
          port {[type]} -- [description] (default: {None})
  
      ## 汇率 EXCHANGERATE
          10         4      基本汇率         FE
          11         4      交叉汇率         FX