实验5 文件应用编程

with open('data3.txt','r',encoding='utf-8') as f:
    data=f.readlines()
    f.close()
with open('data3_proxessed.txt','w',encoding='utf-8') as b:
    a=['四舍五入后数据']
    for i in range(len(data)):
        data[i]=data[i].strip('\n')
    for i in data[1:]:
        a.append(str(round(eval(i))))
    for i in range(len(data)):
        b.write(data[i]+'\t'+a[i]+'\n')
    b.close()
    ys=[]
    zz=[]
    for i in data[1:]:
        i=eval(i.strip('\n'))
        ys.append(i)
    print(f'原始数据:\n',ys)
    for i in data[1:]:
        i=round(eval(i))
        zz.append(i)
    print('四舍五入后数据:\n',zz)

with open('data4.txt', 'r+', encoding='utf-8')as f:
    a = [i.strip('\n').split('\t') for i in f]
    b = a[0]
    a.pop(0)
    a.sort(key=lambda x: (x[2], -int(x[-1])))  # 第三列升序，第四列降序
with open('data4_progressed.txt', 'w+', encoding='utf-8')as f:
    f.write('\t'.join(b) + '\n')
    for line in a:
        f.write('\t'.join(line)+'\n')
with open('data4_progressed.txt', 'r', encoding='utf-8')as f:
    print(f.read())

with open('data5.txt','r',encoding= 'utf-8') as f:
    data = f.read()
a = len(data.splitlines())
b = len(data.split())
c = 0
for i in data:
    if i == ' ':
        c += 1
d = len(data)
print(f'行数:{a}')
print(f'单词数:{b}')
print(f'空格数:{c}')
print(f'字符数:{d}')
with open('data5_with_line.txt','w',encoding='utf-8') as f:
    for t in range(a):
        f.write(str(t+1)+'  '+data.split('\n')[t]+'\n')