实验五

三

with open('data3.txt','r+',encoding='utf-8')as f:
    a=[]
    for i in f:
        i=i.strip('\n')
        a.append(i)
a.pop(0)
b=[eval(i) for i in a]
print(f'原始数据:\n{b}')
c=[round(eval(i)) for i in a]
print(f'四舍五入后数据:\n{c}')
with open('data3-1.txt','w',encoding='utf-8')as f:
    w1=['原始数据']+[str(i) for i in a]
    w2=['四舍五入后的数据']+[str(i) for i in c]
    for i in range(len(a)):
        f.write(f'{w1[i]}\t{w2[i]}\n')

四

with open('data4.txt','r+',encoding='utf-8')as f:
    a=[i.strip('\n').split('\t') for i in f]
    b=a.pop(0)
    a.sort(key=lambda x:(x[2],-int(x[-1])))
    print('\t'.join(b))
    for i in a:
        print('\t'.join(i))
with open('data4.1.txt','w',encoding='utf-8')as f:
    f.write('\t'.join(b)+'\n')
    for i in a:
        f.write('\t'.join(i)+'\n')

五

with open('data5.txt', 'r', encoding='UTF-8') as f:
    text = ''.join([i for i in f])
    print(f'行数：{len(text.splitlines())}')
    print(f'单词数：{len(text.split())}')
    print(f"空格数：{text.count(' ')}")
    print(f'字符数：{len(text)}')

with open('data5.txt', 'r', encoding='UTF-8') as f:
    lines=f.readlines()
    ls=[str(i+1)+' '+line for i,line in enumerate(lines)]
    new_content=''.join(ls)
    print(new_content)
with open('data5.1.txt','w',encoding='utf-8')as f:
    f.write(new_content)

实验总结：每一个代码都可以有多种不同的实现方式，但是核心思想不变，只要掌握核心思想，接下来就是怎样操作的问题。

也许某一个实验有更简便的方法，但是最重要的是自己去探索！