def list22(x):
            """ Test create two lists comprehensions and a third walking the first two """
            a = [y - 1 for y in x]
            b = [y + 1 for y in x]
            return [x for x in a for y in b if x == y]
 Test create two lists comprehensions and a third walking the first two 
numba/tests/test_comprehension.py