IB API调用报错：TradingApp.error()缺失必填参数advancedOrderRejectJson

使用环境 #

• Python 3.1
• Spyder 5.4.2
• IB API 10.19

原始代码 #

from ibapi.client import EClient
from ibapi.wrapper import EWrapper
from ibapi.contract import Contract
import threading
import time


class TradingApp(EWrapper, EClient):
    def __init__(self):
        EClient.__init__(self,self)
        
    def error(self, reqId, errorCode, errorString, advancedOrderRejectJson):
        print("Error {} {} {} {}".format(reqId,errorCode,errorString,advancedOrderRejectJson))
        
    def contractDetails(self, reqId, contractDetails):
        print("redID: {}, contract:{}".format(reqId,contractDetails))

def websocket_con():
    app.run()
    event.wait()
    #if event.is_set():
        #app.close()

event = threading.Event()   
app = TradingApp()      
app.connect("127.0.0.1", 4001, clientId=1)

# starting a separate daemon thread to execute the websocket connection
con_thread = threading.Thread(target=websocket_con)
con_thread.start()
time.sleep(1) # some latency added to ensure that the connection is established

#creating object of the Contract class - will be used as a parameter for other function calls
contract = Contract()
contract.symbol = "AAPL"
contract.secType = "STK"
contract.currency = "USD"
contract.exchange = "SMART"

app.reqContractDetails(100, contract) # EClient function to request contract details
time.sleep(5) # some latency added to ensure that the contract details request has been processed
event.set()

问题现象 #

• 在Spyder的IPython控制台首次运行代码可成功，再次运行触发错误：TypeError: TradingApp.error() missing 1 required positional argument: 'advancedOrderRejectJson'
• 关闭IPython控制台后可再次运行，但第二次运行仍会失败
• 在终端直接运行代码则直接报错
• 注释掉error函数后，仅关闭IPython控制台标签后能运行一次，再次运行会出现AttributeError: 'TradingApp' object has no attribute 'close'错误

解决方案 #

1. 修正error方法参数签名 #

IB API 10.19中EWrapper.error的标准定义里，advancedOrderRejectJson是可选参数（带默认值），你的实现没有设置默认值，导致回调时参数不匹配。修改error方法：

def error(self, reqId, errorCode, errorString, advancedOrderRejectJson=""):
    print("Error {} {} {} {}".format(reqId, errorCode, errorString, advancedOrderRejectJson))

2. 修复连接关闭与线程逻辑 #

• EClient没有close方法，正确的关闭连接方式是调用disconnect()
• 移除冗余的threading.Event逻辑，简化线程管理：

修改后的websocket_con函数及后续代码：

def websocket_con():
    app.run()

# 创建实例前先清理可能存在的旧连接
try:
    app.disconnect()
except NameError:
    pass

app = TradingApp()      
app.connect("127.0.0.1", 4001, clientId=1)

# 启动守护线程，程序结束时自动退出
con_thread = threading.Thread(target=websocket_con, daemon=True)
con_thread.start()
time.sleep(1)

# 合约定义部分保持不变
contract = Contract()
contract.symbol = "AAPL"
contract.secType = "STK"
contract.currency = "USD"
contract.exchange = "SMART"

app.reqContractDetails(100, contract)
time.sleep(5)

# 执行完请求后主动断开连接
app.disconnect()

3. Spyder环境特殊处理 #

Spyder的IPython控制台会保留全局变量和线程状态，重复运行时旧连接线程可能未销毁。除了代码里的清理逻辑，也可以每次运行前点击控制台的"重启内核"按钮，彻底清除残留状态。

内容的提问来源于stack exchange，提问作者jacob666