# File lib/ai4r/classifiers/one_r.rb, line 71
      def get_rules
        return @zero_r.get_rules if @zero_r
        sentences = []
        attr_label = @data_set.data_labels[@rule[:attr_index]]
        class_label = @data_set.data_labels.last
        @rule[:rule].each_pair do |attr_value, class_value|
          sentences << "#{attr_label} == '#{attr_value}' then #{class_label} = '#{class_value}'"
        end
        return "if " + sentences.join("\nelsif ") + "\nend"        
      end