def are_none(sequences: Sequence[Sized]) -> bool:
    """
    Returns True if all sequences are None.
    """
    if not sequences:
        return True
    return all(s is None for s in sequences)
def are_none ( sequences : Sequence [ Sized ] ) -> bool : if not sequences : return True return all ( s is None for s in sequences )
Returns True if all sequences are None.