Traceback (most recent call last):
  File "C:......address_book.py", line 57, in <module>
    search = a.search_contact('Simpson')
  File "C:......address_book.py", line 40, in search_contact
    template = '{}, {}, -- Phone Number: {}, --Email: {}'.format(self.lastname, self.firstname, self.phone_number, self.email)
AttributeError: 'AddressBook' object has no attribute 'lastname

class Person:
   def __init__(self, lastname, firstname, phone_number, email):
      self.lastname = lastname
      self.firstname = firstname
      self.phone_number = phone_number
      self.email = email

   def __str__(self):
      template = '{}, {}, -- Phone Number: {}, --Email: {}'.format(self.lastname, self.firstname, self.phone_number, self.email)
      template = template.replace('[','').replace(']','').replace("'", '')
      return template.format(self)

class AddressBook(Person):
   def __init__(self):
      self.book = []

   def add_contact(self, Person):
      Per = Person
      return Per

   def search_contact(self, lastname):
      if lastname:
          template = '{}, {}, -- Phone Number: {}, --Email: {}'.format(self.lastname, self.firstname, self.phone_number, self.email)
          return template.format(self)

if __name__ == '__main__':
   #     Bob = Person('Lop', 'Bob', '5559358150', 'bob@mail.com)
   #     print(Bob)
   #     Joe = Person('Roe', 'Joe', '5551940325',['joe@mail.com', 'roe@mail.com'])
   #     print(Joe)

   a = AddressBook()
   added = a.add_contact(Person('Homer', 'Simpson', '5559355899', 'homer@mail.com'))
 # print(added)
   added_1 = a.add_contact(Person('Marge', 'Simpson', '5559352365', 'marge@mail.com'))
 # print(added_1)
   search = a.search_contact('Simpson')
   print(search)