How to get the text content of a code cell?

[Zelphir Kaltstahl]

So as far as I know Jupyter Notebook uses the CodeMirror editor to render code cells. In the CodeMirror documentation I found the method `doc.getValue` which is supposed to give the editor's content. According to this topic, there is no documentation for the JS API of Jupyter Notebook.

My question is: How do I get the (code) content of a/all code cell(s)? Better even would be a way to get only the code cell's contents of code cells, which are assigned a specific CSS class or other identifying feature.

[Kiko]

2017-03-14 11:20 GMT+01:00 Zelphir Kaltstahl <zelphirk...@gmail.com>:

So as far as I know Jupyter Notebook uses the CodeMirror editor to render code cells. In the CodeMirror documentation I found the method `doc.getValue` which is supposed to give the editor's content. According to this topic, there is no documentation for the JS API of Jupyter Notebook.

My question is: How do I get the (code) content of a/all code cell(s)? Better even would be a way to get only the code cell's contents of code cells, which are assigned a specific CSS class or other identifying feature.

You could provide metadata to the cells you want to extract, e.g.:

{
  "extract": true
}

and then, from javascript, you could do:

var cells = Jupyter.notebook.get_cells()
for (var i=0;i<cells.length;i++){

    if (cells[i].metadata['extract'] && cell.cell_type === "code"){
        console.log(cells[i].get_text())       
    }
}

 

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[Kiko]

Sorry, a bug :-P, corrected version

var cells = Jupyter.notebook.get_cells()
for (var i=0;i<cells.length;i++){

    if (cells[i].metadata['extract'] && cells[i].cell_type === "code"){
        console.log(cells[i].get_text())       
    }
}

[Zelphir Kaltstahl]

Hey, thanks for the idea with the meta data! This could work well. I'll try soon.

On Tuesday, March 14, 2017 at 12:22:24 PM UTC+1, Kiko correoso garcia wrote:

Sorry, a bug :-P, corrected version

var cells = Jupyter.notebook.get_cells()
for (var i=0;i<cells.length;i++){

    if (cells[i].metadata['extract'] && cells[i].cell_type === "code"){
        console.log(cells[i].get_text())       
    }
}

2017-03-14 12:20 GMT+01:00 Kiko <kikoco...@gmail.com>:

2017-03-14 11:20 GMT+01:00 Zelphir Kaltstahl <zelphirk...@gmail.com>:

So as far as I know Jupyter Notebook uses the CodeMirror editor to render code cells. In the CodeMirror documentation I found the method `doc.getValue` which is supposed to give the editor's content. According to this topic, there is no documentation for the JS API of Jupyter Notebook.

My question is: How do I get the (code) content of a/all code cell(s)? Better even would be a way to get only the code cell's contents of code cells, which are assigned a specific CSS class or other identifying feature.

You could provide metadata to the cells you want to extract, e.g.:

{
  "extract": true
}

and then, from javascript, you could do:

var cells = Jupyter.notebook.get_cells()
for (var i=0;i<cells.length;i++){

    if (cells[i].metadata['extract'] && cell.cell_type === "code"){
        console.log(cells[i].get_text())       
    }
}

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[Zelphir Kaltstahl]

Works like a charm!

On Tuesday, March 14, 2017 at 12:22:24 PM UTC+1, Kiko correoso garcia wrote:

Sorry, a bug :-P, corrected version

var cells = Jupyter.notebook.get_cells()
for (var i=0;i<cells.length;i++){

    if (cells[i].metadata['extract'] && cells[i].cell_type === "code"){
        console.log(cells[i].get_text())       
    }
}

2017-03-14 12:20 GMT+01:00 Kiko <kikoco...@gmail.com>:

2017-03-14 11:20 GMT+01:00 Zelphir Kaltstahl <zelphirk...@gmail.com>:

So as far as I know Jupyter Notebook uses the CodeMirror editor to render code cells. In the CodeMirror documentation I found the method `doc.getValue` which is supposed to give the editor's content. According to this topic, there is no documentation for the JS API of Jupyter Notebook.

My question is: How do I get the (code) content of a/all code cell(s)? Better even would be a way to get only the code cell's contents of code cells, which are assigned a specific CSS class or other identifying feature.

You could provide metadata to the cells you want to extract, e.g.:

{
  "extract": true
}

and then, from javascript, you could do:

var cells = Jupyter.notebook.get_cells()
for (var i=0;i<cells.length;i++){

    if (cells[i].metadata['extract'] && cell.cell_type === "code"){
        console.log(cells[i].get_text())       
    }
}

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[ehic...@illinois.edu]

Hi, late to the party, but if anyone else is interested in the future, I found another way to get the code cell contents from Python. To access the code as it is going to be received for execution, you can register to the IPython event `pre_run_cell` (https://ipython.readthedocs.io/en/stable/api/generated/IPython.core.events.html#IPython.core.events.pre_run_cell). If your registered function signature takes the parameter `info`, you can access the code cell's contents with `info.raw_cell`.