def is_tuple(val: tuple) -> tuple:
    """Assertion for a tuple type value.

    Args:
        val: check value (expect tuple type)

    Returns:
        Same value to input.

    Raises:
        Assertion Error: if a value not match a tuple type.
    """
    assert isinstance(val, tuple), f"Must be a Tuple type value!: {type(val)}"
    return val