统一多个不同长度的list并以某个值填充长度短的list，最终输出dict，Python

def merge_time_and_score(list1:[],list2:[]):
    last1=list1[-1]
    last2=list2[-1]
    if len(list1) >= len(list2):
        keys = list1
        values = list2 + [last2] * (len(list1) - len(list2))
    else:
        values = list2
        keys = list1 + [last1] * (len(list2) - len(list1))

    return {'time':keys,'socre':values}