[已解决]利用Python使用操作系统题目

L1ve

问题如图所示，我写了好久都没搞定，求助大佬

最佳答案

月排行榜 / 总排行榜

傻眼貓咪

2022-12-10 17:29:38

(1)
main.py

1. # 打开文件 MyFile.txt，写入数据
   
2. nameHandle = open('MyFile.txt', 'w')
   
3. nameHandle.write('one\n')
   
4. nameHandle.write('two\n')
   
5. nameHandle.close()
   
6. 
   
7. # 打开文件 MyFile.txt，读取数据
   
8. nameHandle = open('MyFile.txt', 'r')
   
9. for line in nameHandle:
   
10.     print(line[:-1])
    
11. nameHandle.close()
    
12. 
    
13. # 打开文件 MyFile.txt，在文件尾端写入数据
    
14. nameHandle = open('MyFile.txt', 'a')
    
15. nameHandle.write('three\n')
    
16. nameHandle.write('four\n')
    
17. nameHandle.close()
    
18. 
    
19. # 打开文件 MyFile.txt，读取数据
    
20. nameHandle = open('MyFile.txt', 'r')
    
21. for line in nameHandle:
    
22.     print(line[:-1])
    
23. nameHandle.close()

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结果：
MyFile.txt

1. one
   
2. two
   
3. three
   
4. four
   

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---

(2)
main.py

1. students = {'a': 89, 'b': 60, 'c': 45, 'd': 90, 'e': 95}
   
2. 
   
3. FILE = open('grade.txt', 'w')
   
4. 
   
5. for each in students.items():
   
6.     name, score = each
   
7.     FILE.write(f"{name} {score}\n")
   
8. 
   
9. FILE.close()
   
10. 
    
11. # --------------------- 这是分界线 ---------------------
    
12. FILE = open('grade.txt', 'r')
    
13. 
    
14. for line in FILE:
    
15.     name, score = line.split()
    
16.     if int(score) > 80:
    
17.         print(f"{name} {score}")
    
18. 
    
19. FILE.close()

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结果：
grade.txt

1. a 89
   
2. b 60
   
3. c 45
   
4. d 90
   
5. e 95
   

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打印结果：

1. a 89
   
2. d 90
   
3. e 95

复制代码

跳转到最佳答案楼层

L1ve

傻眼貓咪

(1)
main.py

1. # 打开文件 MyFile.txt，写入数据
   
2. nameHandle = open('MyFile.txt', 'w')
   
3. nameHandle.write('one\n')
   
4. nameHandle.write('two\n')
   
5. nameHandle.close()
   
6. 
   
7. # 打开文件 MyFile.txt，读取数据
   
8. nameHandle = open('MyFile.txt', 'r')
   
9. for line in nameHandle:
   
10.     print(line[:-1])
    
11. nameHandle.close()
    
12. 
    
13. # 打开文件 MyFile.txt，在文件尾端写入数据
    
14. nameHandle = open('MyFile.txt', 'a')
    
15. nameHandle.write('three\n')
    
16. nameHandle.write('four\n')
    
17. nameHandle.close()
    
18. 
    
19. # 打开文件 MyFile.txt，读取数据
    
20. nameHandle = open('MyFile.txt', 'r')
    
21. for line in nameHandle:
    
22.     print(line[:-1])
    
23. nameHandle.close()

复制代码

结果：
MyFile.txt

1. one
   
2. two
   
3. three
   
4. four
   

复制代码

---

(2)
main.py

1. students = {'a': 89, 'b': 60, 'c': 45, 'd': 90, 'e': 95}
   
2. 
   
3. FILE = open('grade.txt', 'w')
   
4. 
   
5. for each in students.items():
   
6.     name, score = each
   
7.     FILE.write(f"{name} {score}\n")
   
8. 
   
9. FILE.close()
   
10. 
    
11. # --------------------- 这是分界线 ---------------------
    
12. FILE = open('grade.txt', 'r')
    
13. 
    
14. for line in FILE:
    
15.     name, score = line.split()
    
16.     if int(score) > 80:
    
17.         print(f"{name} {score}")
    
18. 
    
19. FILE.close()

复制代码

结果：
grade.txt

1. a 89
   
2. b 60
   
3. c 45
   
4. d 90
   
5. e 95
   

复制代码

打印结果：

1. a 89
   
2. d 90
   
3. e 95

复制代码