keras-team/keras · error · ValueError

Expected input to have rank >= 2. Received input with shape

Error message

Expected input to have rank >= 2. Received input with shape {x.shape}.

What it means

Error "Expected input to have rank >= 2. Received input with shape {x.shape}." thrown in keras-team/keras.

Source

Thrown at keras/src/backend/numpy/linalg.py:104

        b = np.expand_dims(b, axis=-1)
        return _vectorized_solve_triangular(a, b).squeeze(axis=-1)
    return _vectorized_solve_triangular(a, b)


def svd(x, full_matrices=True, compute_uv=True):
    return np.linalg.svd(x, full_matrices=full_matrices, compute_uv=compute_uv)


def lstsq(a, b, rcond=None):
    a = convert_to_tensor(a)
    b = convert_to_tensor(b)
    return np.linalg.lstsq(a, b, rcond=rcond)[0]


def matrix_rank(x, tol=None):
    x = convert_to_tensor(x)
    if x.ndim < 2:
        raise ValueError(
            "Expected input to have rank >= 2. "
            f"Received input with shape {x.shape}."
        )
    return np.linalg.matrix_rank(x, tol=tol).astype("int32")


def matrix_power(a, n):
    a = convert_to_tensor(a)
    return np.linalg.matrix_power(a, n)


def pinv(x, rcond=None):
    x = convert_to_tensor(x)
    return np.linalg.pinv(x, rcond=rcond)


def jvp(fun, primals, tangents, has_aux=False):
    raise NotImplementedError("JVP is not supported by the Numpy backend.")

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/numpy/linalg.py:104 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/7c9fb52aaf0d423a. Report an issue: GitHub.