如何计算重复数并按最多重复数排序

def calculate_duplicate_numbers(arr):
    # 统计每个数字出现的次数
    count_dict = {}
    for num in arr:
        if num in count_dict:
            count_dict[num] += 1
        else:
            count_dict[num] = 1
    
    # 按照出现次数进行排序
    sorted_nums = sorted(count_dict.keys(), key=lambda x: count_dict[x], reverse=True)
    
    return sorted_nums

# 测试示例
arr = [1, 2, 3, 2, 4, 3, 4, 4, 5, 1, 1]
sorted_nums = calculate_duplicate_numbers(arr)
print(sorted_nums)