new_contents: import datetime
  
  class Person(object):
      """
      Create a person called name 
      """
      def __init__(self, name):
          self.name = name
          self.birthday = None
          self.lastName = name.split(' ')[-1]
          
      def getLastName(self):
          """ return self's last name """
          return self.lastName
          
      def setBirthday(self, month, day, year):
          ''' set self's birthday to birthdate '''
          self.birthday = datetime.date(year, month, day)
          
      def getAge(self):
          ''' return self's current age in days '''
          if self.birthday == None:
              raise ValueError
          return (datetime.date.today() - self.birthday).days
          
      def __lt__(self, other):
          ''' To be able to use the less than operator on objects,
          one must use the magic method __lt__
          '''
          if self.lastName == other.lastName:
              return self.name < other.name
          return self.lastName < other.lastName
          
      def __str__(self):
          ''' return self's name '''
          return self.name
  
subject: Create Person Class Practice