实验6

def is_valid(n):
    n=str(n)
    while len(n)==18:
        for i in n:
            if i.isdigit()==False and i!='X':
                return False
        return True
        break
    else:
        return False
with open('data3.txt', 'r', encoding='utf-8') as f:
    data=f.read().split('\n')
data1=data[1:]
data2=[]
for i in range(len(data1)):
    data1[i]=data1[i].split(',')
    if is_valid(data1[i][-1])==True:
        data2.append(data1[i])
dic=dict()
for j in data2:
    j[1]=j[1][6:14]
    dic[j[0]]=j[1]

list= list(dic.items())
list1=sorted(list)
for key, value in list1:
    print(f'{value}: {key}')

 

 

 测试5

 

with open('data5.txt', 'r', encoding='utf-8') as f:
    data = f.read().split('\n')
import random
n=random.randint(1,len(data))
list=[]
list=random.sample(data, n)
import datetime
t = datetime.datetime.now()
filename = t.strftime('%Y%m%d') + '.txt'
with open(filename, 'w', encoding='utf-8') as f:
    f.writelines('\n'.join(list))