实验5 文件应用编程

本文主要是介绍实验5 文件应用编程，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

task3

 1 with open('data3.txt','r+', encoding='UTF-8') as f:  # 这边后续会给出更优的做法
 2     num = [line.strip('\n') for line in f]
 3     num.pop(0)
 4     num_print = [eval(i) for i in num]
 5     print(f"原始数据:\n{num_print}")
 6     num_new = [round(eval(i)) for i in num]
 7     print(f'四舍五入后的数据:\n{num_new}')
 8     write1 = ['原始数据'] + [str(i) for i in num]
 9     write2 = ['四舍五入后的数据'] + [str(i) for i in num_new]
10     f.seek(0)
11     for i in range(len(num)):
12         f.write(f"{write1[i]}\t{write2[i]}\n")

截图：

task4

 1 with open('data4.txt', 'r+', encoding='UTF-8') as f:
 2     string = [i.strip('\n').split('\t') for i in f]
 3     a = string.pop(0)
 4     string.sort(key=lambda x: (x[2], -int(x[-1])))
 5     print('\t'.join(a))
 6     for i in string:
 7         print('\t'.join(i))
 8 
 9 with open('data4_processed.txt', 'w') as f :
10     f.write('\t'.join(a))
11     f.write('\n')
12     for i in string:
13         f.write('\t'.join(i))
14         f.write('\n')

截图：

task5

 1 with open('data5.txt', 'r+', encoding='UTF-8') as f:
 2     text = ''.join([i for i in f])
 3     print(f'行数：{len(text.splitlines())}')
 4     print(f'单词数：{len(text.split())}')
 5     print(f"空格数：{text.count(' ')}")
 6     print(f'字符数：{len(text)}')
 7 
 8 with open('data5_with_line.txt', 'w', encoding='UTF-8') as f:
 9     for i in range(len(text.splitlines())):
10         f.write('{} {}'.format(i+1,text.split('\n')[i]))
11         f.write('\n')

截图：

总结：

文件根本不会，实在是太难了，yue

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