实验6 文件应用编程-2

6.3

def is_valid(x):
    data=x
    if len(data)!=18:
        return False
    else:
        if ord(data[-1])==88 or 48<=ord(data[-1])<=57:
            return True
        else:
            return False

with open('data3_id.txt','r')as f:
    data=f.readlines()
    for i in data:
        info = [line.rstrip('\n').split(',') for line in data]
    m=info[0]
    del info[0]
    a=[]
for i in info:
    if is_valid(i[1])==True:
            a.append([i[0],i[1][6:10]+'-'+i[1][10:12]+'-'+i[1][12:14]])
a.sort(key=lambda x:x[1])
for i in a:
    print(f'{i[0]},{i[1]}')

 

6.5.1

import random
with open('data5.txt','r')as f:
    data=f.readlines()
    info=[line.rstrip('\n') for line in data]
    a = [line.split('\t') for line in info]

import random
a=random.sample(a, 5)
for i in a:
    print('{:<10}{:<10}{:30}'.format(i[0],i[1],i[2]))
import datetime
t=datetime.datetime.now()


with open(t.strftime('%Y%m%d') + '.txt', 'w')as f:
    for i in a:
        f.write('{:<30}{:<20}{:<10}'.format(i[0],i[1],i[2])+'\n')

 

 6.5.2

import random
with open('data5.txt','r')as f:
    data=f.readlines()
    a=[line.rstrip('\n').split(',') for line in data]
m='抽点开始'
c=[]
import random
print(f'{m:=^40}')
while True:
    n=eval(input('入随机抽点人数:'))
    b=random.sample(a, n)
    for i in b:
        a.remove(i)
    if n>0:
        for i in b:
            print(i[0])
            c.append(i[0])
    else:
        n='抽点结束'
        print(f'{n:=^40}')
        break

import datetime
t=datetime.datetime.now()

with open(t.strftime('%Y%m%d') + '.txt', 'w')as f:
    for i in c:
        f.write(i+'\n')

 

 

实验总结

列表对齐输出尚未完全明白。