code: def randomTraversal(sensations, numTraversals):
      
      newSensations = []
      for _ in range(numTraversals):
        s = copy.deepcopy(sensations)
        random.shuffle(s)
        newSensations += s
      return newSensations
docs: Given a list of sensations, return the SDRs that would be obtained by
      numTraversals random traversals of that set of sensations.
  
      Each sensation is a dict mapping cortical column index to a pair of SDR's
      (one location and one feature).