old_contents: #! /usr/bin/python
  
  # See README.txt for information and build instructions.
  
  import addressbook_pb2
  import sys
  
  # Iterates though all people in the AddressBook and prints info about them.
  def ListPeople(address_book):
    for person in address_book.person:
      print "Person ID:", person.id
      print "  Name:", person.name
      if person.HasField('email'):
        print "  E-mail address:", person.email
  
      for phone_number in person.phone:
        if phone_number.type == addressbook_pb2.Person.MOBILE:
          print "  Mobile phone #: ",
        elif phone_number.type == addressbook_pb2.Person.HOME:
          print "  Home phone #: ",
        elif phone_number.type == addressbook_pb2.Person.WORK:
          print "  Work phone #: ",
        print phone_number.number
  
  # Main procedure:  Reads the entire address book from a file and prints all
  #   the information inside.
  if len(sys.argv) != 2:
    print "Usage:", sys.argv[0], "ADDRESS_BOOK_FILE"
    sys.exit(-1)
  
  address_book = addressbook_pb2.AddressBook()
  
  # Read the existing address book.
  f = open(sys.argv[1], "rb")
  address_book.ParseFromString(f.read())
  f.close()
  
  ListPeople(address_book)
  
new_contents: #! /usr/bin/python
  
  # See README.txt for information and build instructions.
  
  import addressbook_pb2
  import sys
  
  # Iterates though all people in the AddressBook and prints info about them.
  def ListPeople(address_book):
    for person in address_book.person:
      print "Person ID:", person.id
      print "  Name:", person.name
      if person.HasField('email'):
        print "  E-mail address:", person.email
  
      for phone_number in person.phone:
        if phone_number.type == addressbook_pb2.Person.MOBILE:
          print "  Mobile phone #:",
        elif phone_number.type == addressbook_pb2.Person.HOME:
          print "  Home phone #:",
        elif phone_number.type == addressbook_pb2.Person.WORK:
          print "  Work phone #:",
        print phone_number.number
  
  # Main procedure:  Reads the entire address book from a file and prints all
  #   the information inside.
  if len(sys.argv) != 2:
    print "Usage:", sys.argv[0], "ADDRESS_BOOK_FILE"
    sys.exit(-1)
  
  address_book = addressbook_pb2.AddressBook()
  
  # Read the existing address book.
  f = open(sys.argv[1], "rb")
  address_book.ParseFromString(f.read())
  f.close()
  
  ListPeople(address_book)
  
subject: Make Python example output identical to C++ and Java by removing redundant spaces.