实验四

#实验六
with open('data6_1.txt','r',encoding='utf-8') as f:
    x=f.readlines()
    xx=[]
    for i in x:
        a=i.strip('\n').split('\t')
        xx.append(a)
    s=lambda xx: xx[2]
    xx.sort(key=s,reverse=True)
print(f'{xx}\n')
with open('data6_2.txt','w+',encoding='utf-8') as f:
    for i in xx:
        data='  '.join(i) +'\n'
        f.write(data)
#实验七
with open('data7.txt','r') as f:
    data=f.readlines()
import random
n=eval(input("输入抽取人数："))
x=list(random.choices(data, k=n))
print(x)
import datetime
t = datetime.datetime.now()
y=t.strftime('%Y%m%d')
with open(f'{y}.txt','w') as f:
    for i in x:
        f.write(i)