使用TargetPosTask如何只打印出最近成交记录

from tqsdk import TqApi, TargetPosTask
 '''
价差回归
当近月-远月的价差大于200时做空近月，做多远月
当价差小于150时平仓
'''
api = TqApi()
quote_near = api.get_quote("SHFE.rb2003")
quote_deferred = api.get_quote("SHFE.rb2005")
# 创建 rb2003 的目标持仓 task，该 task 负责调整 rb2003 的仓位到指定的目标仓位
target_pos_near = TargetPosTask(api, "SHFE.rb2003")
# 创建 rb2005 的目标持仓 task，该 task 负责调整 rb2005 的仓位到指定的目标仓位
target_pos_deferred = TargetPosTask(api, "SHFE.rb2005")
 account = api.get_account()       
orders = api.get_order()
 while True:
    api.wait_update()
    if api.is_changing(quote_near) or api.is_changing(quote_deferred):
        spread = quote_near.last_price - quote_deferred.last_price
        print("当前价差:", spread)
        if spread > 250:
            print("目标持仓: 空近月，多远月")
            # 设置目标持仓为正数表示多头，负数表示空头，0表示空仓
            target_pos_near.set_target_volume(-1)
            target_pos_deferred.set_target_volume(1)
        elif spread < 200:
            print("目标持仓: 空仓")
            target_pos_near.set_target_volume(0)
            target_pos_deferred.set_target_volume(0)
         for order in orders.items():
            pass
        print(quote_datetime, "下单合约:{}, 下单时间:{}, 委托状态:{}, 下单方向:{}, 委托方向:{},委托手数:{}, 未成交手数:{}, 委托价格:{}".format
                (order[1].instrument_id, insert_timestamp, order[1].last_msg, order[1].direction, 
                order[1].offset, order[1].volume_orign, order[1].volume_left, order[1].limit_price)
                )    
            print("账户权益:{}, 可用资金:{}, 保证金:{}, {}多头持仓:{}, {}空头持仓:{}".format
                (account.balance, account.available, position_nearby.margin,
                position_nearby.instrument_id, position_nearby.pos_long, position_deferred.instrument_id, position_deferred.pos_short)
                )

使用TargetPosTask进行套利下单，然后用api.get_order()获取委托信息，api.get_order()返回的是所有委托单记录，如何编写下单时只返回一次当前的委托记录和账户情况