new_contents: class Level(object):
      """Represents user level
      """
      def __init__(self, level=1):
          """Level class initializer
  
          :param level: int positive number that represents level
          """
          self.level = level
  
      def __repr__(self):
          return "<Level '{0}' at {1}>".format(self.level, hex(id(self)))
  
subject: create class Level - basic class methods