每次我向字典添加新密钥时，整个字典都会被重写

Question

if len(numList) < 2:
        return "List is too short"
    else:
        count = 1
        a = {1: numList}
        for i in range(len(numList)):
            for j in range(0, len(numList)-i-1):
                if numList[j]>numList[j+1]:
                    temp = numList[j]
                    numList[j] = numList[j+1]
                    numList[j+1] = temp
                    count +=1
                    a[count] = numList
                    print(a)
        return a

a应该在冒泡排序的每个步骤中返回一个字典，但是返回一个字典，其中包含尝试次数和键对的每对都是相同的排序列表