new_contents: from random import randint
  
  
  class BasicOperators(object):
  
      digit_dict = {'single': randint(0, 9),
                    'double': randint(10, 99),
                    'triple': randint(100, 999)}
  
      def check_ans(self):
          if int(self.userAnswer) == self.answer:
              print "\nCorrect!"
          else:
              print "\nWrong. Correct answer is:", self.answer
  
      def get_numbers(self, digit):
          number = self.digit_dict[digit]
          return number
  
  
  class Addition(BasicOperators):
  
      def addition_func(self, digit1, digit2):
          number1 = self.get_numbers(digit1)
          number2 = self.get_numbers(digit2)
          self.answer = number1 + number2
          self.userAnswer = raw_input('%d + %d = ' % (number1, number2))
          self.check_ans()
  
  
  class Subtraction(BasicOperators):
      # Needs some work...
  
      def __init__(self, neg):
          self.neg = neg
  
      def get_subtr_numbers(self, digit):
          # Continue working on getting non-negative numbers.
          pass
  
      def subtraction_func(self, digit1, digit2):
          number1 = self.get_numbers(digit1)
          number2 = self.get_numbers(digit2)
          self.answer = number1 - number2
          self.userAnswer = raw_input('%d - %d = ' % (number1, number2))
          self.check_ans()
  
  
  class Multiplication(BasicOperators):
  
      def __init__(self):
          # Put some code about what type of mult you want
          pass
  
      def mult_func(self):
          self.answer = self.digit1 * self.digit2
          self.userAnswer = raw_input('%d\nx %d' % (self.digit1, self.digit2))
          self.check_ans()
  
  
  class Division(BasicOperators):
  
      def __init__(self):
          # Put some code about what type of div you want
          pass
  
      # Some functions of division
  
  
  if __name__ == '__main__':
      y = BasicOperators('double')
      x = Addition()
      x.addition_func()
  
subject: Create arithmetics.py