实验6 文件应用编程

task_3

def is_valid(a):
    b = 0; c = 0
    for i in a:
        b += 1
        if '0' <= i <= '9' or i == 'X':
            pass
        else:
            c += 1
            break
    if b != 18 or c != 0:
        return False
    if b == 18 and c == 0:
        return True
with open("data3_id.txt","r",encoding="utf-8") as f:
    data = f.readlines()
d = []
for line in data:
    d.append(line.strip('\n').split(','))
e = []
for i in d:
    if is_valid(i[1]):
       e.append(i)
print(f'{d[0][0]},{d[0][1]}')
e.sort(key=lambda x: x[1][6:14])
for i in e:
    a=[]
    v = i[1]
    x = i[0]+","+v[6:10]+"-"+v[10:12]+"-"+v[12:14]
    a.append(x)
    print(','.join(a))

 

 task_5_1

with open("data5.txt","r",encoding="utf-8") as f:
    d=f.readlines()
import random
n=int(input("输入随机抽点人数:"))
f1=set()
l=len(f1)
while l<n:
    f=random.randint(0,len(d))
    f1.add(d[f])
    l=len(f1)
for i in f1:
    print(i,end="")
with open("20220518.txt","w",encoding="utf-8") as f:
    for i in f1:
        f.write(i)

 

 

 

 

 

 task_5_2

with open("data5.txt","r",encoding="utf-8") as f:
    d=f.readlines()
import random
with open("20220518_1.txt","a",encoding="utf-8") as f11:
    flag = 1
    while (flag == 1):
        n = int(input("输入随机抽点人数："))
        if n == 0:
            flag = 0
        else:
            f1 = set()
            l = len(f1)
            while l < n:
                f = random.randint(0, len(d))
                f1.add(d[f])
                l = len(f1)
            for i in f1:
                print(i, end="")
                f11.write(i)