old_contents: # This program checks name and age
  name = input("What's your name?")
  age = int(input("How old are you?"))
  if name == 'Alice':
      print('Hi, Alice.')
  elif age < 12:
      print('You are not Alice, kiddo.')
  else:
      print('You are neither Alice nor a little kid.')
  
new_contents: """Little kid
  
  This program checks name and age, but not as many ages.
  
  """
  
  
  def main():
      name = input("What's your name?")
      age = int(input("How old are you?"))
      if name == 'Alice':
          print('Hi, Alice.')
      elif age < 12:
          print('You are not Alice, kiddo.')
      else:
          print('You are neither Alice nor a little kid.')
  
  
  # If P03_littleKid.py is run (instead of imported as a module), call
  # the main() function:
  if __name__ == '__main__':
      main()
  
subject: Update P03_littleKid.py added docstring and wrapped in main() function