请帮我看看这个问题。我试图提交任务的工具叫做viope.com网站，这是一个自学环境，它有时会在检查代码时出错。我的代码在第一轮似乎可以正常工作，但我不明白为什么在第二轮选择1时它没有打印，它似乎捕获了文件名的更改。任务另外一个持续的项目，笔记本电脑，也依赖于用户的操作，因为如果用户决定不写任何东西就去读文件，它就会崩溃。在本练习中，我们修复了这个问题，并添加了在程序运行时更改所用笔记本文件的可能性。在

首先，通过检查是否有文件来启动程序“笔记本.txt“如果没有的话就创造一个。如果必须这样做，还应通知用户警告“未找到默认笔记本，已创建一个”。在

当此功能正常工作时，向笔记本添加第四个选项，“(4)更改笔记本”。如果用户选择此选项，系统将提示用户输入新文件“Give the new file name:”。如果存在现有文件，则打开该文件并将其加载到笔记本程序中，而关闭旧的笔记本文件。如果新的笔记本文件不存在，系统会通知用户“没有检测到具有该名称的笔记本，已创建一个。”并生成一个新文件。同时在主菜单“Now using file[filename]”中添加已用笔记本文件的注释。正确的输出应该如下所示：>>>

No default notebook was found, created one.

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 2

Write a new note: Buy milk.

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 4

Give the name of the new file: otherbook.txt

No notebook with that name detected, created one.

Now using file otherbook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 2

Write a new note: Buy pineapples.

Now using file otherbook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 4

Give the name of the new file: notebook.txt

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 1

Buy milk.:::12:05:23 04/25/11

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 5

Notebook shutting down, thank you.

>>>

我的代码：

^{pr2}$

我的代码输出：# python3.2 ohjelma.py

No default notebook was found, created one.

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 2

Write a new note: Buy milk.

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 4

Give the name of the new file: otherbook.txt

No notebook with that name detected, created one.

Now using file otherbook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 2

Write a new note: Buy pineapples.

Now using file otherbook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 4

Give the name of the new file: notebook.txt

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 1

Buy milk.:::21:11:24 11/04/11

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 5

Notebook shutting down, thank you.

# python3.2 ohjelma.py

No default notebook was found, created one.

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 2

Write a new note: Buy pineapples.

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 4

Give the name of the new file: otherbook.txt

No notebook with that name detected, created one.

Now using file otherbook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 1

Now using file otherbook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 4

Give the name of the new file: notebook.txt

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 1

Now using file notebook.txt

(1) Read the notebook

(2) Add note

(3) Empty the notebook

(4) Change the notebook

(5) Quit

Please select one: 5

Notebook shutting down, thank you.