old_contents: import uuid
  
  
  class Note(object):
      """
      A note.
      Currently has a title, tags, texr and a priority."""
  
      def __init__(self, title, tags, text, priority=1, unique_id=None):
          if unique_id is None:
              self.id = str(uuid.uuid4())
          else:
              self.id = unique_id
          self.title = title
          self.tags = tags
          self.text = text
          self.priority = priority
  
      def __str__(self):
          return str(self.to_dictionary)
  
      def to_dictionary(self):
          return {
              self.id: {
                  'title': self.title,
                  'tags': str(self.tags),
                  'text': self.text,
                  'priority': self.priority,
              }
          }
  
  
  class Tag(object):
      """A note tag, for categorisation/filtering"""
      def __init__(self, type, frequency):
          self.type = type
          self.frequency = frequency
  
      def __str__(self):
          return "[{0}] {1}".format(self.frequency, self.type)
  
new_contents: import uuid
  
  
  class Note(object):
      """
      A note.
      Currently has a title, tags, texr and a priority."""
  
      def __init__(self, title, tags, text, priority=1, unique_id=None):
          if unique_id is None:
              self.id = str(uuid.uuid4())
          else:
              self.id = unique_id
          self.title = title
          self.tags = self.__verify_tags(tags)
          self.text = text
          self.priority = priority
  
      def __str__(self):
          return str(self.to_dictionary)
  
      def __verify_tags(self, tags):
          return list(set(tags))
  
      def to_dictionary(self):
          return {
              self.id: {
                  'title': self.title,
                  'tags': str(self.tags),
                  'text': self.text,
                  'priority': self.priority,
              }
          }
  
  
  class Tag(object):
      """A note tag, for categorisation/filtering"""
      def __init__(self, type, frequency):
          self.type = type
          self.frequency = frequency
  
      def __str__(self):
          return "[{0}] {1}".format(self.frequency, self.type)
  
subject: Remove duplicate tags during init