NameError：在Python中使用Pyalgotrade並未定義全局名稱'indicator'

Question

我試圖在Pyal中使用Pyalgotrade庫中的列表函數編寫Ultimate Oscillator。

我的代碼如下：

from pyalgotrade.tools import yahoofinance 
from pyalgotrade import strategy 
from pyalgotrade.barfeed import yahoofeed 
from pyalgotrade.technical import stoch 
from pyalgotrade import dataseries 
from pyalgotrade.technical import ma 
from pyalgotrade import technical 
from pyalgotrade.technical import highlow 
from pyalgotrade import bar 
from pyalgotrade import talibext 
import numpy 
import talib 

class MyStrategy(strategy.BacktestingStrategy): 
    def __init__(self, feed, instrument): 
     strategy.BacktestingStrategy.__init__(self, feed) 

     self.__instrument = instrument 

    barDs = self.getFeed().getDataSeries("002389.SZ") 

    self.__ultosc = indicator.ULTOSC(barDs, 36) 

    bar = bars[self.__instrument] 
    self.info("%0.2f, %0.2f" % (bar.getClose(), self.__ultosc[-1])) 


# Downdload then Load the yahoo feed from the CSV file 
yahoofinance.download_daily_bars('002389.SZ', 2013, '002389.csv') 
feed = yahoofeed.Feed() 
feed.addBarsFromCSV("002389.SZ", "002389.csv") 

# Evaluate the strategy with the feed's bars. 
myStrategy = MyStrategy(feed, "002389.SZ") 
myStrategy.run() 

而且我得到了這樣的錯誤：

File "/Users/johnhenry/Desktop/untitled.py", line 23, in onBars 
    self.__ultosc = indicator.ULTOSC(barDs, 36) 
NameError: global name 'indicator' is not defined 

該功能可以在http://gbeced.github.io/pyalgotrade/docs/v0.15/html/talib.html

終極擺動指標發現：

pyalgotrade .talibext.indicator.ULTOSC（barDs，count，timeperiod1 = -2147483648，t imeperiod2 = -2147483648，timeperiod3 = -2147483648）

Answer 1

你不進口indicator，也不是你通過它定義的模塊引用它更改此：

self.__ultosc = indicator.ULTOSC(barDs, 36) 

分爲：

self.__ultosc = talibext.indicator.ULTOSC(barDs, 36) 

它應該沒問題。