如何对包含在字典中的元素列表的最后一个值求和？

def sum_last_value(dictionary):
    if not dictionary:
        return 0

    value = dictionary.get('list')
    if not value:
        return 0

    last_element = value[-1]
    if isinstance(last_element, (int, float)):
        return last_element
    elif isinstance(last_element, dict):
        return sum_last_value(last_element)
    elif isinstance(last_element, list):
        total = 0
        for element in last_element:
            if isinstance(element, (int, float)):
                total += element
        return total
    else:
        return 0