实验四

task7-3
import random
#时间模块
import datetime
time=datetime.datetime.now()
time=time.strftime("%Y%m%d")
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："))
#利用集合，避免重复
m=set()
while n >0:
    w_data=set()#利用集合，避免单次抽点重复
#随机抽取人数模块
    while len(w_data-m)<n and len(data)>=len(m)+n:
        ra=random.randint(0,len(data)-1)
        w_data.add(str(data[ra]))
    if len(data)-len(m)==0:
        print("班级同学已经全被点过")
    elif len(data)<len(m)+n and len(data)-len(m) !=0:
        print(f"抽点的人数多了，班级内只剩{len(data)-len(m)}个没有被抽到")
        exit()
    else:
        #写入模块       
        with open(f"{time}.txt","a",encoding="utf-8")as f:
            for line in w_data - m:
                f.write(line +"\n")
                print(line)
        m=m | w_data
    n=eval(input("输入随机抽点人数："))

task7-2

if __name__ == '__main__':
    main()
#时间模块
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："))

#随机抽取人数模块
m=set()
while len(m) < n:
    ra=random.randint(0,len(data)-1)
    m.add(str(data[ra]))

#写入模块
with open(f"{time}.txt","w+",encoding="utf-8")as f:
    for line in m:
        f.write(line +"\n")
        print(line)

 

 

with open('D:\\data6_1.txt','r',encoding='utf-8') as f:
    t=[]
    for line in f.readlines():
        m=line.strip().split()
        t.append(m)
t.sort(key=lambda l:l[2],reverse=True)

with open('data6_2.txt','w+',encoding='utf-8') as n:
        for i in t:
            n.write('  '.join(i)+'\n')
复制代码
 
import random

def get_lucky_boy(lis:list,trys:int):
    result=[]
    for i in range(trys):
        boy=random.choice(lis)
        lis.remove(boy)
        result.append(boy)
    t=[]
    for i in result:
        t.append(' '.join(i)+'\n')
    return ''.join(t)
ls=[]
with open('D:\\data7.txt','r',encoding='utf-8') as f:
   for line in f.readlines():
       m=line.strip().split()
       ls.append(m)
n=int(input('yikutu desuka?'))
boys=get_lucky_boy(lis=ls,trys=n)
print(boys)
with open('lucky.txt','w',encoding='utf-8') as nf:
        nf.write(boys)

with open('data1_1.txt', 'r', encoding = 'utf-8') as f:
    data = f.readlines()

n = 0
for line in data:
    if line.strip('\n') == '':
        continue
    n += 1
print(f'共{n}行')#

with open('data1_1.txt', 'r', encoding = 'utf-8') as f:
    n = 0
    for line in f:
        if line.strip('\n') == '':
            continue
        n += 1

print(f'共{n}行')#

with open('data2.txt', 'r', encoding = 'utf-8') as f:
    data = f.read().split('\n')

unique_line = []
for line in data:
    if data.count(line) == 1:
        unique_line.append(line)

print(f'共{ len(unique_line) }独特行')
for i in unique_line:
    print(i)