这样报错，我应该怎样修改代码

from tqsdk import TqApi,TqAuth,tafunc,TqKq,TargetPosTask,TqSim
from tqsdk.tafunc import ma
import time
from tqsdk.ta import MA,MACD
import numpy as np
 SHORT = 30  # 短周期
LONG = 60  # 长周期
SYMBOL = "SHFE.rb2401"  # 合约代码
 api = TqApi(TqKq(),auth=TqAuth("XXXXX","XXXXXX"))
print("策略开始运行")
 data_length = LONG + 2  # k线数据长度
# "duration_seconds=60"为一分钟线, 日线的duration_seconds参数为: 24*60*60
klines = api.get_kline_serial(SYMBOL, duration_seconds=60, data_length=data_length)
target_pos = TargetPosTask(api, SYMBOL)
 while True:
    api.wait_update()
     if api.is_changing(klines.iloc[-1], "datetime"):  # 产生新k线:重新计算SMA
        short_avg = MA(klines, SHORT)['ma'] # 短周期
        long_avg = MA(klines, LONG)['ma'] # 长周期
        macd=MACD(klines, 12, 26, 9)
        mdif=(list(macd["diff"]))
        mdea=(list(macd["dea"]))
        mbar=(list(macd["bar"]))
          #0轴上，慢线（dea）下穿快线（dif）,做空；做空开仓后，若慢线上穿快线，平仓
        if mdif > 0 and mdea > 0 and mdea < mdif:
           target_pos.set_target_volume(-5)
           print("做空")
           if mdea > mdif:
              target_pos.set_target_volume(0)
              print("平仓")
          #0轴下，慢线（dea）上穿快线（dif）,做多；做多开仓后，若慢线下穿快线，平仓
        if mdif < 0 and mdea < 0 and mdea > mdif:
           target_pos.set_target_volume(5)
           print("做多")
           if mdea < mdif:
              target_pos.set_target_volume(0)
              print("平仓")