每次与前一个数据作对比，回溯算法

# 每次与前一个数据作对比，回溯算法
path = 'data/text.txt'
data = [i.replace('\n', '')[:4] for i in list(open(path, encoding='utf-8'))]
print(data)
print('data', len(data))
num = 10000035

list1 = [data[0]]
#
for i in data:
    del (list1[:-1])
    list1.append(i)
    if list1[0] == i:
        res = f'相同：{i}:{num}'
        print(res)
    else:
        num += 1
        res = f'不同：{i}:{num}'
        print(res)