实验四

实验内容：

1. 实验任务6

with open('data6_1.txt','r',encoding='utf-8') as f:
    d=f.read().split('\n')

d1=[str(n).split("\t") for n in d]

d1.sort(key=lambda x: x[2],reverse=True)
with open('data6_2.txt','w+',encoding='utf-8') as f:
    for line in d1:
        for n in line:
            f.write(n+'\t')
            print(n+'\t',end='')
        f.write('\n')
        print()

 

 

 

 2.实验任务7

   7.1

import random
with open('data7.txt','r',encoding='gbk')as f:
    data=f.read().split('\n')
n=eval(input('输入随机抽点人数：'))
m=set()
while len(m) < n:
    ra=random.randint(0,len(data)-1)
    m.add(str(data[ra]))
with open('lucky.txt','w+',encoding='utf-8')as f:
    for line in m:
        f.write(line +'\n')
        print(line)

 

 

 

     7.2

import datetime
time=datetime.datetime.now()
time=time.strftime('%Y%m%d')
import random
with open('data7.txt','r',encoding='gbk')as f:
    data=f.read().split('\n')
n=eval(input('输入随机抽点人数：'))
m=set()
while len(m) < n:
    ra=random.randint(0,len(data)-1)
    m.add(str(data[ra]))
with open(f'{time}.txt','w+',encoding='utf-8')as f:
    for line in m:
        f.write(line +'\n')
        print(line)