实验5 文件应用编程

实验任务6

 1 with open('data6.csv','r',encoding = 'gbk') as f:
 2     old_data = f.read().split('\n')
 3 del old_data[0]
 4 
 5 new_data = []
 6 for i in range(len(old_data)):
 7     if eval(old_data[i]) + float(0.5) >= int(eval(old_data[i])) + 1:
 8         new_data.append(str(int(eval(old_data[i]))+1))
 9     else:
10         new_data.append(str(int(eval(old_data[i]))))
11 
12 title = ['原始数据','四舍五入后数据']
13 data = []
14 for i in range(len(old_data)):
15     data.append([old_data[i],new_data[i]])
16 
17 with open('data6.csv','w',encoding = 'gbk') as f:
18     f.write(','.join(title) + '\n')
19     for i in data:
20         f.write(','.join(i) + '\n')
21 print('原始数据：')
22 print(old_data)
23 print('四舍五入后数据：')
24 print(new_data)

实验任务7

 1 with open('data7.csv','r',encoding='gbk')as f:
 2     title=[f.readline()]
 3     data=f.readlines()
 4 def getscore(ls):
 5     return ls[len(ls)-1]
 6 
 7 data=[line.strip('\n').split(',')for line in data]
 8 
 9 data.sort(key=lambda x:(x[2],-int(x[3])))
10 
11 
12 with open('data7_processed.csv', 'w', encoding = 'gbk') as f:
13     f.write(','.join(title))
14     for item in data:
15         f.write(','.join(item) + '\n')
16 title=title[0].strip('\n').split(',')
17 
18 print('{:<10}'.format(title[0]),'{:<10}'.format(title[1]),'{:<10}'.format(title[2]),'{:<15}'.format(title[3]))
19 for i in data:
20     print('{:<10}'.format(i[0]), '{:<10}'.format(i[1]), '{:<10}'.format(i[2]), '{:<10}'.format(i[3]))

实验任务8

 1 with open('hamlet.txt','r',encoding='utf-8')as f:
 2     data=f.readlines()
 3     print('行数：',len(data))
 4 
 5 x=''
 6 for line in data:
 7     x+=line
 8 alpha=0
 9 b=0
10 for i in x:
11     if i.isalpha():
12         alpha+=1
13     else:
14         b+=1
15 
16 word=len(x.split())
17 print('字符数：',alpha+b)
18 print('单词数：',word)
19 print('空格数：',x.count(' '))
20 data = [line.strip('\n').split(',') for line in data]
21 with open('hamlet_with_line_number','w',encoding='utf-8') as f:
22     for i,j in enumerate(data,start=1):
23         j=j[0]
24         f.write("{}{}{}".format(i,' ',j)+'\n')

实验任务9

def is_valid(sfz):
    if len(sfz) != 18:
        return False
    elif (sfz[:-1].isnumeric() and sfz[-1] == 'X') or sfz.isnumeric():
        return True
    else:return False


with open('data9_id.txt','r',encoding='utf-8') as f:
    data = f.read().split('\n')
del data[0]
data2 = []
data3 =[]
print('姓名,出生日期,年龄')
for i in data:
    lst = i.split(',')
    data2.append(lst)
lst2 = []
for i in data2:
    if is_valid(i[1]) == True:
        name = i[0]
        btd = i[1][6:14]
        age = str(2023 - int(i[1][6:10]))
        lst2.append([name,btd,age])
lst2.sort(key=lambda x:x[2],reverse=True)
for i in lst2:
    print(i[0],end=',')
    print(f'{i[1][:4]}-{i[1][4:6]}-{i[1][6:8]}',end=',')
    print(i[2])

实验任务10

task10_1

 1 import datetime
 2 t = datetime.datetime.now()
 3 filename = t.strftime('%Y%m%d') + '.txt'
 4 n=eval(input('输入随机抽取人数：'))
 5 with open('data10_stu.txt', 'r', encoding = 'utf-8') as f:
 6     data=f.readlines()
 7 
 8 
 9 def random_selection(n):
10     import random
11     demo = random.sample(data, n)
12     return demo
13 x=random_selection(n)
14 for i in x :
15     print(i)

task10_2

 1 with open('data10_stu.txt','r',encoding='utf-8') as f:
 2     data = f.readlines()
 3 print('{:*^40}'.format('抽点开始'))
 4 n = int(input('输入随机抽点人数:'))
 5 import random
 6 x = []
 7 sum1 = 0
 8 x2 = ''
 9 while n != 0:
10     counts = 0
11     while counts < n:
12         new = random.randint(0, len(data) - 1)
13         if new in x:
14             new = random.randint(0, len(data) - 1)
15         else:
16             counts +=1
17             x.append(new)
18     for i in range(sum1,sum1+n):
19         print(data[x[i]])
20         x2 += data[x[i]]
21     sum1 += n
22     n = int(input('输入随机抽点人数:'))
23 
24 with open('20230602.txt','w',encoding='utf-8') as f:
25     f.writelines(x2)
26 
27 print('{:*^40}'.format('抽点结束'))