1 import unittest
   2 
   3 f = lambda n: n%10==0 and 10 or n%10
   4 def compute_check_mod1110(str):
   5     t = 10
   6     for c in str:
   7         t = (2 * f(t + ord(c) - 48)) % 11
   8     return (11 - t) % 10
   9 
  10 class CheckTest(unittest.TestCase):
  11     def testMod112(self):
  12         self.assertEquals(5, compute_check_mod1110('0794'))
  13         self.assertEquals(5, compute_check_mod1110('00200667308'))
  14         self.assertEquals(3, compute_check_mod1110('00200667309'))
  15         self.assertEquals(8, compute_check_mod1110('00200667310'))
  16         self.assertEquals(6, compute_check_mod1110('00200667311'))
  17         self.assertEquals(4, compute_check_mod1110('00200667312'))
  18 
  19 if __name__=='__main__':
  20     unittest.main()