def test_roundtrip(self):
for i in range(1000):
Isbn10.strip(Isbn10.protect(randint(0, 2 ** 32 - 1)))
def test_roundtrip(self):
for i in range(1000):
x = randint(0, 2 ** 32 - 1)
print (x)
Isbn10.strip(Isbn10.protect(x))
