code: def setValue(self, t, value):
      if value is not None:
          pos = self.__mapPos(t)
          self.__values[pos] = value
  
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 6 for calling the Event obj's underlying member method code with example usage: obj.setValue(t, value) without return types