import_records_from_csv.rb

def attrs
  @attrs ||= Reading.new.attributes.keys.take(5).last(4)
end

def data
  @data ||= File.read("tmp/output_small_test.csv")
end

def rows
  data.split()
end

def cells
  rows.map {|r| r.split(",") }
end

def hashes
  cells.map do |row|
    attrs.zip(row).
      map {|lbl, val| {lbl.to_sym => val }}.
      reduce(&:merge)
  end
end

def readings
  hashes.map {|r| Record.new(r) }
end

Oh, maybe you transcribed it into this gist and changed some names? Otherwise, its not clear to me why attrs are pulled from Reading, but then assigned to Record.