# File lib/ai4r/data/data_set.rb, line 62
      def open_csv_file(filepath, &block)
        if CSV.const_defined? :Reader
          CSV::Reader.parse(File.open(filepath, 'r')) do |row|
            block.call row
          end
        else
          CSV.parse(File.open(filepath, 'r')) do |row|
            block.call row
          end
        end
      end