code: def getHedgeRatioDS(self):
      return self.__hedgeRatio
  
imports: from __future__ import print_function
  from pyalgotrade import strategy
  from pyalgotrade import dataseries
  from pyalgotrade.dataseries import aligned
  from pyalgotrade import plotter
  from pyalgotrade.barfeed import yahoofeed
  from pyalgotrade.stratanalyzer import sharpe
  import numpy
  import statsmodels.api
label_desc: Use image node_id 3 for calling the StatArb obj's underlying member method code with example usage: obj.getHedgeRatioDS() and returns: self