code: def _generateRangeDescription(self, ranges):
      
      desc = ""
      numRanges = len(ranges)
      for i in xrange(numRanges):
        if ranges[i][0] != ranges[i][1]:
          desc += "%.2f-%.2f" % (ranges[i][0], ranges[i][1])
        else:
          desc += "%.2f" % (ranges[i][0])
        if i < numRanges - 1:
          desc += ", "
      return desc
docs: generate description from a text description of the ranges