interactive-brokers - 有没有办法使用盈透证券 IBAPI 库获取多只股票的实时 OHLC 数据？

Question

我正在尝试为多只股票获取 OHLC。但是，我是 IBAPI 的新手，我找不到任何同时获取多个股票 OHLC 的示例。这是代码：

class TestApp(EWrapper, EClient):
    def __init__(self):
        EClient.__init__(self, self)
    def error(self, reqId, errorCode, errorString):
        print("Error: ", reqId, " ", errorCode, " ", errorString)
    
    def realtimeBar(self, reqId, time:int, open_: float, high: float, low: float, close: float,volume: int, wap: float, count: int):
        super().realtimeBar(reqId, time, open_, high, low, close, volume, wap, count)
        print(RealTimeBar(time, -1, open_, high, low, close, volume, wap, count))

app = TestApp()
app.connect("127.0.0.1", 7499, 0)

contract = Contract()
contract.secType = "STK" 
contract.symbol = "XYZ"
contract.currency = "XYZ"
contract.exchange = "XYZ"

app.reqRealTimeBars(1,contract,1,'TRADES',False,[]) 

app.run()

任何人都可以帮我解决我缺少或没有得到的东西吗？提前致谢。