实验五 文件应用编程

实验五  文件应用编程

实验任务六

程序源代码：

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

实验结果：

实验任务七

程序源代码： 

 1 with open('data7.csv','r',encoding = 'gbk') as f:
 2     data = f.readlines()
 3 data_t = ['学号','姓名','专业','分数']
 4 data1 = [i.strip('\n').split(',') for i in data]
 5 data1.remove(data1[0])
 6 
 7 data2=sorted(data1,key=lambda x:(x[2],-int(x[3])))
 8 with open('data7_processed.csv','w',encoding = 'gbk') as f:
 9     f.write(','.join(data_t) + '\n')
10     for item in data2:
11         f.write(','.join(item) + '\n')
12 
13 print(f'{"学号":10s}{"姓名":10s}{"专业":10s}{"分数":10s}')
14 for a,b,c,d in data2:
15     print('{:<10s}{:<10s}{:<10s}{:<10}'.format(a,b,c,d))

实验结果：

实验任务八

程序源代码：

 1 with open('hamlet.txt','r',encoding='utf-8')as f:
 2     data = f.read()
 3     data1 = f.readlines()
 4 
 5 print('hamlet.txt粗略统计:')
 6 print(f'行数:{len(data.splitlines())}')
 7 print(f'单词数:{len(data.split())}')
 8 print(f'字符数:{len(data)}')
 9 print(f'空格数:{data.count(" ")}')
10 data2 = []
11 for i in range(len(data1)):
12     data2.append('{}'.format(i+1)+'.'+data1[i]+'\n')
13 with open('hamlet.txt','w',encoding='utf-8') as f:
14     for i in data2:
15         f.write(','.join(data2)+'\n')

实验结果：

实验任务九

程序源代码：

 1 def is_valid(sfz):
 2     if len(sfz) != 18:
 3         return False
 4     elif (sfz[:-1].isnumeric() and sfz[-1] == 'X') or sfz.isnumeric():
 5         return True
 6     else:return False
 7 
 8 
 9 with open('data9_id.txt','r',encoding='utf-8') as f:
10     data = f.read().split('\n')
11 del data[0]
12 data2 = []
13 data3 =[]
14 print('姓名,出生日期,年龄')
15 for i in data:
16     lst = i.split(',')
17     data2.append(lst)
18 lst2 = []
19 for i in data2:
20     if is_valid(i[1]) == True:
21         name = i[0]
22         btd = i[1][6:14]
23         age = str(2023 - int(i[1][6:10]))
24         lst2.append([name,btd,age])
25 lst2.sort(key=lambda x:x[2],reverse=True)
26 for i in lst2:
27     print(i[0],end=',')
28     print(f'{i[1][:4]}-{i[1][4:6]}-{i[1][6:8]}',end=',')
29     print(i[2])

实验结果：

实验任务十

task10-1

程序源代码：

 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)

实验结果：

task10-2

程序源代码：

 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('20230601.txt', 'w', encoding='utf-8') as f:
25     f.writelines(x2)
26 
27 print('{:*^40}'.format('抽点结束'))

实验结果：