new_contents: import jimbob
  import unittestdef 
  three_times_x_plus_two(x):   
     y = jimbob.three_times(x)    
     if y is None:        
         return None    
     else:        
         return y + 2
         
         
  class MyTest(unittest.TestCase):    
      def test(self):        
          self.assertEqual(three_times_x_plus_two(3), 11)        
          self.assertEqual(three_times_x_plus_two(3.1), 11.3)        
          self.assertEqual(three_times_x_plus_two("a"), None)
  
subject: Create JaneBob.py