test_multiarray.py 文件源码

def check_count_nonzero(self, power, length):
        powers = [2 ** i for i in range(length)]
        for i in range(2**power):
            l = [(i & x) != 0 for x in powers]
            a = np.array(l, dtype=np.bool)
            c = builtins.sum(l)
            self.assertEqual(np.count_nonzero(a), c)
            av = a.view(np.uint8)
            av *= 3
            self.assertEqual(np.count_nonzero(a), c)
            av *= 4
            self.assertEqual(np.count_nonzero(a), c)
            av[av != 0] = 0xFF
            self.assertEqual(np.count_nonzero(a), c)