我想提取重复项中的最大值

def extract_max_duplicate_value(data):
    count_dict = {}
    
    # 统计重复项出现的次数
    for item in data:
        if item in count_dict:
            count_dict[item] += 1
        else:
            count_dict[item] = 1
    
    max_value = None
    max_count = 0
    
    # 找到重复项中的最大值
    for item, count in count_dict.items():
        if count > max_count:
            max_value = item
            max_count = count
    
    return max_value

# 示例用法
data = [1, 2, 3, 4, 2, 3, 4, 4, 4]
max_duplicate_value = extract_max_duplicate_value(data)
print("重复项中的最大值为:", max_duplicate_value)