test_half.py 文件源码

def test_half_ordering(self):
        """Make sure comparisons are working right"""

        # All non-NaN float16 values in reverse order
        a = self.nonan_f16[::-1].copy()

        # 32-bit float copy
        b = np.array(a, dtype=float32)

        # Should sort the same
        a.sort()
        b.sort()
        assert_equal(a, b)

        # Comparisons should work
        assert_((a[:-1] <= a[1:]).all())
        assert_(not (a[:-1] > a[1:]).any())
        assert_((a[1:] >= a[:-1]).all())
        assert_(not (a[1:] < a[:-1]).any())
        # All != except for +/-0
        assert_equal(np.nonzero(a[:-1] < a[1:])[0].size, a.size-2)
        assert_equal(np.nonzero(a[1:] > a[:-1])[0].size, a.size-2)