keras-team/keras · error · ValueError

Input `x` should be a tuple of two tensors - real and imagin

Error message

Input `x` should be a tuple of two tensors - real and imaginary.Received: x={x}

What it means

Error "Input `x` should be a tuple of two tensors - real and imaginary.Received: x={x}" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/tensorflow/math.py:116

    if x.shape[-1] != y.shape[-1]:
        raise ValueError("Last dimension of inputs to `cdist` must match")
    diff = tf.expand_dims(x, -2) - tf.expand_dims(y, -3)
    return tf.sqrt(tf.reduce_sum(tf.square(diff), axis=-1))


def extract_sequences(x, sequence_length, sequence_stride):
    return tf.signal.frame(
        x,
        frame_length=sequence_length,
        frame_step=sequence_stride,
        axis=-1,
        pad_end=False,
    )


def _get_complex_tensor_from_tuple(x):
    if not isinstance(x, (tuple, list)) or len(x) != 2:
        raise ValueError(
            "Input `x` should be a tuple of two tensors - real and imaginary."
            f"Received: x={x}"
        )
    # `convert_to_tensor` does not support passing complex tensors. We separate
    # the input out into real and imaginary and convert them separately.
    real, imag = x
    real = convert_to_tensor(real)
    imag = convert_to_tensor(imag)
    # Check shapes.
    if real.shape != imag.shape:
        raise ValueError(
            "Input `x` should be a tuple of two tensors - real and imaginary."
            "Both the real and imaginary parts should have the same shape. "
            f"Received: x[0].shape = {real.shape}, x[1].shape = {imag.shape}"
        )
    # Ensure dtype is float.
    if not real.dtype.is_floating or not imag.dtype.is_floating:
        raise ValueError(

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/tensorflow/math.py:116 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/75b49d0886acc429. Report an issue: GitHub.