new_contents: import json
  
  def serialize(data):
      """
      Serialize a dictionary object to a String.
  
      :param data: dictionnary object
  
      :returns: str representation of the serialized dictionary.
      """
      return json.dumps(data, sort_keys=True, indent=4, separators=(',', ': '))
  
  def deserialize(dataStr):
      """
      Deserialize a string into a dictionnary object.
  
      :param dataStr: str representation of a dictionary
  
      :returns: dict object.
      """
      return json.loads(dataStr)
  
subject: Add serializer module.