使用“重新启动&全部运行" [英] Jupyter notebook custom.js not applied when using "Restarting & Run All"

问题描述

为了获得正在运行的Jupyter笔记本的名称，我首先在〜/.jupyter/custom/custom.js中添加了以下行

In order to get the name of a running Jupyter notebook, I first added the following line in ~/.jupyter/custom/custom.js

// Create a nb_name variable with the name of the notebook
IPython.notebook.kernel.execute('nb_name = "' + IPython.notebook.notebook_name + '"');

然后，当我使用以下命令运行单元格时，在笔记本上

Then on my notebook when I run a cell with:

print(nb_name)

我得到:

NameError                                 Traceback (most recent call last)
<ipython-input-1-7e37f787d8df> in <module>()
----> 1 print(nb_name)

NameError: name 'nb_name' is not defined

要解决此问题，我需要在第一行添加一个警报命令:

To solve this issue I need to add a first line with an alert command:

alert("hello world from custom.js")

// Create a nb_name variable with the name of the notebook
IPython.notebook.kernel.execute('nb_name = "' + IPython.notebook.notebook_name + '"');

然后，当我加载笔记本时，会显示一个警报窗口，一旦关闭它，我将按预期获得笔记本的名称.

Then an alert window shows up when I load my notebook, and once I closed it, I get the notebook name as expected.

我如何在没有用户任何操作的情况下使它工作(我正在使用笔记本电脑版本5.0.0，并且由于我不是服务器的管理员，所以无法更新它)?

How could I make it work without any action from the user (I am using notebook version 5.0.0 and as I am not the admin of the server cannot update it)?

通过Jupyter内核(Jupyter Notebook扩展)执行代码时，等待内核准备就绪部分解决了该问题. Custom.js文件，其中包含:

Question in Waiting for kernel to be ready when executing code via Jupyter kernel (Jupyter Notebook extension) solved partially the problem. Custom.js file containing:

Jupyter.notebook.events.one('kernel_ready.Kernel', () => {
     // Create a nb_name variable with the name of the notebook
     IPython.notebook.kernel.execute('nb_name = "' + IPython.notebook.notebook_name + '"');
});

按预期方式返回笔记本名称.现在的问题是，当我重新启动并运行所有程序"时，仍然收到上面提到的错误消息.任何意见或想法都将受到欢迎.

Return the notebook name as expected. Now the problem is I still get the error message mentioned above when I "Restart & Run All". Any comment or idea would be welcome.

推荐答案

custom.js kernel_ready.Kernel事件仅在页面加载时触发一次，但在Restart & Run all之后不会触发(或其任何变体).对于这个问题，我的解决方案有点骇客":

custom.js kernel_ready.Kernel event is triggered only once when the page is loaded, but it is not triggered after Restart & Run all (or any variants of it). My solution to this problem is a bit hackie:

/**
 * `kernel_ready` logic
 */
function custom_kernel_ready_handler() {
    IPython.notebook.kernel.execute('nb_name = "' + IPython.notebook.notebook_name + '"');
}

function handle_kernel_ready() {
    // Create a nb_name variable with the name of the notebook
     console.log('kernel_ready.Kernel: handle_kernel_ready() was triggered!');
     custom_kernel_ready_handler();

     Jupyter.notebook.events.one('kernel_ready.Kernel', () => {
         //this recursive behavior is esential for `restart` kernel
         handle_kernel_ready();
    });
}

Jupyter.notebook.events.one('kernel_ready.Kernel', () => {
     handle_kernel_ready();
});

希望有更好的解决方案...

Hoping for better solutions ...

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