作业4

with open('data6_1.txt', 'r', encoding = 'utf-8') as f:
data = f.read().split('\n')
content = [str(i).split('\t') for i in data]
w = lambda content: content[2]
content.sort(key=w, reverse=True)
with open('data6_2.txt', 'w', encoding='utf-8') as f:
for x in content:
for y in x:
f.write(y + '\t')
print(y + '\t', end='')
f.write('\n')
print()

 

x=[]
with open('data7.txt','r') as f:

m=f.readlines()
y=int(input('输入随机抽点人数：'))
import random
i=0
while i<y:
n=random.randint(1,80)
a=m[n]
print(a.strip())
x.append(a)
i+=1
import random
import datetime
t=datetime.datetime.now()

import datetime
time = datetime.datetime.now()
time = time.strftime('%Y%m%d')
import random
with open('data7.txt','r') as f:
data = f.read().split('\n')
n = eval(input('please enter number'))

a= random.randint(0,len(data)-1)
m.add(str(data[a]))
with open(f'{time}.txt','w+') as f:
for line in m:
f.write(line + '\n')
print(line)