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Traceback (most recent call last):
File ""D:\VeighNa_Studio\Lib\site-packages\vnpy_ctastrategy\engine.py"", line 615, in call_strategy_func
func()
~~^^
File ""D:\VeighNa_Studio\Lib\site-packages\vnpy_ctastrategy\strategies\double_ma_strategy.py"", line 46, in on_init
self.load_bar(10)
~
~~^^^^
File ""D:\VeighNa_Studio\Lib\site-packages\vnpy_ctastrategy\template.py"", line 315, in load_bar
callback(bar)
~~~~^^^^^
File ""D:\VeighNa_Studio\Lib\site-packages\vnpy_ctastrategy\strategies\double_ma_strategy.py"", line 75, in on_bar
self.write_log(f""���̼ۣ�{self.bg_5min.bar.close_price}��ʱ�䣺{self.bg_5min.bar.datetime}"")

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self.bg_5min = BarGenerator(self.on_bar, 5, self.on_5min_bar, Interval.MINUTE)
    self.am_5min = ArrayManager(10)

def on_init(self):
    """
    Callback when strategy is inited.
    """
    self.write_log("策略初始化")
    self.load_bar(10)

def on_start(self):
    """
    Callback when strategy is started.
    """
    self.write_log("策略启动")
    self.put_event()

def on_stop(self):
    """
    Callback when strategy is stopped.
    """
    self.write_log("策略停止")

    self.put_event()

def on_tick(self, tick: TickData):
    """
    Callback of new tick data update.
    """
    self.bg_5min.update_tick(tick)

def on_bar(self, bar: BarData):

    """1 分钟 K 线回调"""

    self.bg_5min.update_bar(bar) 
    if not self.bg_5min == None:
        self.write_log(f"收盘价:{self.bg_5min.bar.close_price},时间:{self.bg_5min.bar.datetime}")
    else:
        return    

    self.am_5min.update_bar(bar)
    if not self.am_5min.inited:
        self.write_log("AM NOT INIT...")
        return


    #current_bar = self.bg_5min.bar
    #if current_bar is None:
    #    return

    self.hh = self.am_5min.high_array[-3]
    if self.hh is not None:
        self.write_log(f"HH价:{self.hh}")

    else:
        self.write_log(f"hh is None")
        self.hh=0.0

    self.ll = self.am_5min.sma(self.am_5min.low_array,3)
    if self.ll is not None:
        self.write_log(f"LL价:{self.ll}")   
    #sma(self.am_5min.low_array,3)

    if self.bg_5min.close_price -self.hh>6.0 :
        self.buy(bar.close_price, 1)

    if self.hh - self.bg_5min.close_price >6.0 :
        self.short(bar.close_price, 1)        

    self.put_event()

def on_5min_bar(self, bar: BarData):

    """5 分钟 K 线回调""" 
    self.write_log(f"5min finish 时间:{self.bg_5min.bar.datetime}")        



++++++++++++++++

以上源代码有问题吗?

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