old_contents: #  File:       etl.py
  #  Purpose:    To do the `Transform` step of an Extract-Transform-Load.
  #  Programmer: Amal Shehu
  #  Course:     Exercism
  #  Date:       Thursday 22 September 2016, 03:40 PM
  
  
  def transform(words):
      new_words = dict()
      for point, letters in words.iteritem():
          for letter in letters:
              new_words[letter.lower()] = point
      return new_words
  
new_contents: #  File:       etl.py
  #  Purpose:    To do the `Transform` step of an Extract-Transform-Load.
  #  Programmer: Amal Shehu
  #  Course:     Exercism
  #  Date:       Thursday 22 September 2016, 03:40 PM
  
  
  def transform(words):
      new_words = dict()
      for point, letters in words.items():
          for letter in letters:
              new_words[letter.lower()] = point
      return new_words
  
subject: Fix Attribute error