code: def getValue(self, t):
      pos = self.__mapPos(t)
      return self.__values[pos]
  
imports: import numpy
  import matplotlib.pyplot
  from six.moves import xrange
  from pyalgotrade.technical import roc
  from pyalgotrade import dispatcher
label_desc: Use image node_id 7 for calling the Event obj's underlying member method code with example usage: obj.getValue(t) and returns: self