实验四

f = open(r‘data6_1.txt‘)
f1=open(‘data6_2.txt‘,‘w‘)
a = list(f)
a.sort(key=lambda x : x[8:])
a.reverse()
for i in a:
    i=i.strip(‘\n‘)
    f1.write(‘‘.join(i))
    f1.write(‘\n‘)
    print(‘‘.join(i))

import random
name_num = eval(input(‘请输入抽点人数:‘))
m = set()
with open(‘data7.txt‘,‘r‘) as f:
    a = f.readlines()
    while len(m)<name_num:
        b = random.randint(0,len(a)-1)
        m.add(a[b])

import datetime
time = datetime.datetime.now()
x = time.strftime(‘%Y%m%d‘)
with open(x+‘.txt‘,‘w‘) as n:
    for i in m:
        n.write(i)
        print(i)