实验5 文件应用编程

task3

with open('data3.txt','r+', encoding='UTF-8') as f:  
    num = [line.strip('\n') for line in f]
    num.pop(0)
    num_print = [eval(i) for i in num]
    print(f"原始数据:\n{num_print}")
    num_new = [round(eval(i)) for i in num]
    print(f'四舍五入后的数据:\n{num_new}')

with open('data3_processed.txt','w') as f:  
    write1 = ['原始数据'] + [str(i) for i in num]
    write2 = ['四舍五入后的数据'] + [str(i) for i in num_new]
    for i in range(len(num)):
        f.write(f"{write1[i]}\t{write2[i]}\n")

 

截图：

 

 

 

 

task4

with open('data4.txt', 'r+', encoding='UTF-8') as f:
    string = [i.strip('\n').split('\t') for i in f]
    a = string.pop(0)
    string.sort(key=lambda x: (x[2], -int(x[-1])))
    print('\t'.join(a))
    for i in string:
        print('\t'.join(i))

with open('data4_processed.txt', 'w') as f :
    f.write('\t'.join(a)+'\n')    
11     for i in string:
        f.write('\t'.join(i)+'\n')

截图：

 

 

 

 

task5

with open('data5.txt', 'r+', encoding='UTF-8') as f:
    text = ''.join([i for i in f])
    print(f'行数：{len(text.splitlines())}')
    print(f'单词数：{len(text.split())}')
    print(f"空格数：{text.count(' ')}")
    print(f'字符数：{len(text)}')

with open('data5_with_line.txt', 'w', encoding='UTF-8') as f:
    for i in range(len(text.splitlines())):
        f.write('{} {}\n'.format(i+1,text.split('\n')[i]))

截图：

 

 

 

 

总结：

文件根本不会，实在是太难了，yue