def keys_are_unique(hyperparam_list):
    """Check if the ``base_keys`` in a list of ``HyperparameterOption`` objects are unique.

    Args:
        hyperparam_list (list)(HyperparameterOption): a list of hyperparameter options.

    Returns:
        bool: True if all the ``base_keys`` are unique, otherwise False.

    """
    keys = [item.base_key for item in hyperparam_list]
    keys = set(keys)
    return len(keys) == len(hyperparam_list)