def get_max_delta_score(spliceai_ano_dict_by_symbol):
    """
    get_max_delta_score
    ===================
    Method to get the max SpliceAI delta score from a specific ref/alt key in the spliceai_region_dict

    Parameters:
    -----------
    1) spliceai_ano_dict_by_symbol: (dict) A sub-dict of the spliceai_region_dict for a current pos/ref/alt

    Returns:
    ++++++++
    1) (float) The max delta score
    """

    max_delta_score = 0.0
    for gene, spliceai_annotation in spliceai_ano_dict_by_symbol.items():

        ## Get the current max delta score
        max_ds = max(
            spliceai_annotation["DS_AG"],
            spliceai_annotation["DS_AL"],
            spliceai_annotation["DS_DG"],
            spliceai_annotation["DS_DL"],
        )

        if float(max_ds) > float(max_delta_score):
            max_delta_score = float(max_ds)

    return max_delta_score