test_regression.py 文件源码

def test_object_array_self_reference(self):
        # Object arrays with references to themselves can cause problems
        a = np.array(0, dtype=object)
        a[()] = a
        assert_raises(TypeError, int, a)
        assert_raises(TypeError, long, a)
        assert_raises(TypeError, float, a)
        assert_raises(TypeError, oct, a)
        assert_raises(TypeError, hex, a)

        # Test the same for a circular reference.
        b = np.array(a, dtype=object)
        a[()] = b
        assert_raises(TypeError, int, a)
        # NumPy has no tp_traverse currently, so circular references
        # cannot be detected. So resolve it:
        a[()] = 0

        # This was causing a to become like the above
        a = np.array(0, dtype=object)
        a[...] += 1
        assert_equal(a, 1)