Takes a predicted answer and a gold answer (that are both either a string or a list of
    strings), and returns exact match and the DROP F1 metric for the prediction.  If you are
    writing a script for evaluating objects in memory (say, the output of predictions during
    validation, or while training), this is the function you want to call, after using
    :func:`answer_json_to_strings` when reading the gold answer from the released data file.

def get_metrics(predicted: Union[str, List[str], Tuple[str, ...]],
                gold: Union[str, List[str], Tuple[str, ...]]) -> Tuple[float, float]:
    """
    Takes a predicted answer and a gold answer (that are both either a string or a list of
    strings), and returns exact match and the DROP F1 metric for the prediction.  If you are
    writing a script for evaluating objects in memory (say, the output of predictions during
    validation, or while training), this is the function you want to call, after using
    :func:`answer_json_to_strings` when reading the gold answer from the released data file.
    """
    predicted_bags = _answer_to_bags(predicted)
    gold_bags = _answer_to_bags(gold)

    exact_match = 1.0 if predicted_bags[0] == gold_bags[0] else 0

    f1_per_bag = _align_bags(predicted_bags[1], gold_bags[1])
    f1 = np.mean(f1_per_bag)
    f1 = round(f1, 2)
    return exact_match, f1