如何对bucketsort排序进行降序排序

def bucket_sort_desc(arr, bucket_size=5):
    if len(arr) == 0:
        return arr

    # 确定最小值和最大值
    min_value, max_value = min(arr), max(arr)
    bucket_count = (max_value - min_value) // bucket_size + 1
    buckets = [[] for _ in range(bucket_count)]

    # 分桶
    for i in range(len(arr)):
        buckets[(arr[i] - min_value) // bucket_size].append(arr[i])

    # 对每个桶进行降序排序并合并结果
    sorted_arr = []
    for bucket in buckets:
        # 使用插入排序对桶内元素进行降序排序
        for i in range(1, len(bucket)):
            up = bucket[i]
            j = i - 1
            while j >= 0 and bucket[j] < up:
                bucket[j + 1] = bucket[j]
                j -= 1
            bucket[j + 1] = up
        sorted_arr.extend(bucket[::-1])  # 逆序添加到结果数组中

    return sorted_arr

# 测试代码
arr = [37, 89, 41, 65, 91, 53]
sorted_arr = bucket_sort_desc(arr)
print(sorted_arr)  # 输出应该是降序排列的数组