new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """Exercise 11: Check Primality Functions
  
  Ask the user for a number and determine whether the number is prime or
  not. (For those who have forgotten, a prime number is a number that has
  no divisors.). You can (and should!) use your answer to Exercise 4 to
  help you. Take this opportunity to practice using functions, described
  below.
  
  """
  
  __version__ = "3"
  
  
  def is_prime(number):
      return False \
          if number < 2 or \
          [i for i in range(2, number) if number % i == 0] \
          else True
  
  
  number = int(input("Enter with a number: "))
  
  if is_prime(number):
      print("The number %i is prime." % number)
  else:
      print("The number %i is not prime." % number)
  
subject: Create check_primality_functions.py