Showing line numbers in IPython/Jupyter Notebooks

Question

Error reports from most language kernels running in IPython/Jupyter Notebooks indicate the line on which the error occurred; but (at least by default) no line numbers are indicated in notebooks.

Is it possible to add the line numbers to IPython/Jupyter Notebooks?

It would be also usefull to change the default behavior of the ipython notebook such that it displays line numbers by default — gota, May 05 '15 at 15:43

score 213 · Accepted Answer · edited Sep 09 '17 at 21:37

213

CTRL - ML toggles line numbers in the CodeMirror area. See the QuickHelp for other keyboard shortcuts.

In more details CTRL - M (or ESC) bring you to command mode, then pressing the L keys should toggle the visibility of current cell line numbers. In more recent notebook versions Shift-L should toggle for all cells.

If you can't remember the shortcut, bring up the command palette Ctrl-Shift+P (Cmd+Shift+P on Mac), and search for "line numbers"), it should allow to toggle and show you the shortcut.

edited Sep 09 '17 at 21:37

Matt

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answered Jun 11 '12 at 19:41

minrk

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For Ipython 3 (Jupyter), in command mode (Esc), you just have to press "L" to toggle line numbers – Julien Marrec Jul 09 '15 at 06:41
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Is there a way to add line number automatically to all the cells in Jupiter – ChathuraG Dec 25 '15 at 17:35
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Use `Ctrl-m` `h` to show all keyboard shortcuts in ipython notebook. Alternatively you can click on `QuckHelp` at the top to show the shortcuts – nexayq Jun 27 '16 at 10:21
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`Ctrl-Shift+P` for the win – openwonk Jan 24 '20 at 23:53
you know if posible run some comand in cell directly ?, i haven't access to toolbar o normal options on aws glue notebooks – Cristián Vargas Acevedo Jun 14 '23 at 15:42

score 89 · Answer 2 · edited May 23 '17 at 12:34

89

On IPython 2.2.0, just typing l (lowercase L) on command mode (activated by typing Esc) works. See [Help] - [Keyboard Shortcuts] for other shortcuts.

Also, you can set default behavior to display line numbers by editing custom.js.

edited May 23 '17 at 12:34

Community

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answered Oct 03 '14 at 06:11

ronnefeldt

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I don't understand how this answer was not accepted (maybe posted too late?), because this is the correct one if you don't use CodeMirror but just IPython Notebook. EDIT: in fact IPython Notebook uses CodeMirror. So both answers are correct. Learned something new today, thanks! – gaborous Oct 21 '14 at 15:50
thanks, this worked for jupyter notebook in chrome. this seems easiest... – user391339 Jul 27 '17 at 22:19

score 77 · Answer 3 · edited Mar 21 '19 at 06:25

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Select the Toggle Line Number Option from the View -> Toggle Line Number.

The menu looks like this

edited Mar 21 '19 at 06:25

Jeril

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answered Jan 15 '18 at 06:54

Jitu Shinde

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I can't believe it was this easy. Not sure why it's not on by default when they give errors by line. Would be nice if the notebook just highlighted the line that gave the error. – Kaito Jan 08 '19 at 22:49
This is no longer in the view. :/ have to search for it in the command palette. – Vaidøtas I. Aug 27 '21 at 06:23
@Kaito When your code is a bit more complex, there is maybe not one unique line which led to the error, or the error came from code which you wrote in another cell or imported. Thus I think the highlighting approach is not practicable. – NerdOnTour Feb 17 '22 at 14:58

Vityata · Answer 4 · 2023-03-29T16:23:16.590

13

Press Escape so the left part becomes blue.

Then press L. It works!
If you want to hide them, use the same algorithm.
If you want to impact all Jupiter rows, press Shift + L, while the left part is blue.

edited Mar 29 '23 at 16:23

answered Oct 21 '21 at 12:13

Vityata

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I don't find that toggling line numbers in the last cell affects all cells. But isn't that what you're saying in point 4? – NerdOnTour Feb 22 '22 at 12:56
@NerdOnTour - true, I stay corrected and I have edited (about 13+ months later). To impact all rows, Shift should be pressed, when "L" is pressed. – Vityata Mar 29 '23 at 16:24

score 11 · Answer 5 · edited Apr 30 '20 at 17:45

To turn line numbers on by default in all cells at startup I recommend this link. I quote:

Navigate to your jupyter config directory, which you can find by typing the following at the command line:
jupyter --config-dir
From there, open or create the custom folder.
In that folder, you should find a custom.js file. If there isn’t one, you should be able to create one. Open it in a text editor and add this code:
define([
    'base/js/namespace',
    'base/js/events'
    ],
    function(IPython, events) {
        events.on("app_initialized.NotebookApp",
            function () {
                IPython.Cell.options_default.cm_config.lineNumbers = true;
            }
        );
    }
);

you know if posible run some comand in cell directly ?, i haven't access to toolbar o normal options on aws glue notebooks — Cristián Vargas Acevedo, Jun 14 '23 at 15:42

score 9 · Answer 6 · answered Feb 28 '17 at 21:52

9

Here is how to know active shortcut (depending on your OS and notebook version, it might change)

Help > Keyboard Shortcuts > toggle line numbers

On OSX running ipython3 it was ESC L

answered Feb 28 '17 at 21:52

Thamme Gowda

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score 7 · Answer 7 · edited Jan 24 '19 at 14:17

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For me, ctrl + m is used to save the webpage as png, so it does not work properly. But I find another way.

On the toolbar, there is a bottom named open the command paletee, you can click it and type in the line, and you can see the toggle cell line number here.

edited Jan 24 '19 at 14:17

Noordeen

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answered Apr 08 '16 at 13:31

Pythoner

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score 6 · Answer 8 · edited Feb 22 '22 at 22:45

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Adding to ronnefeldt's accepted answer: Shift L toggles line numbers in all cells. This works in JupyterLab 1.0.0 and in Jupyter Notebooks.

edited Feb 22 '22 at 22:45

NerdOnTour

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answered Dec 17 '19 at 11:19

dzang

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score 6 · Answer 9 · answered Sep 13 '20 at 06:45

6

In Jupyter Lab 2.1.5, it is View -> Show Line Numbers.

answered Sep 13 '20 at 06:45

Sayyor Y

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score 3 · Answer 10 · answered Aug 12 '21 at 06:37

To show line numbers by default in Jupyter lab,

Click on the menu Settings → Advanced Settings Editor (or use the shortcut control+,). An environment with three columns will appear: the settings category, System Defaults, and User Preferences.
Select the category notebook
Set the key "lineNumbers" to true in the "codeCellConfig" options.

For example, (assuming no other user configured settings),:

{
    "codeCellConfig": {
        "lineNumbers": true,
    }
}

score 1 · Answer 11 · edited Jan 24 '19 at 13:38

1

You can also find Toggle Line Numbers under View on the top toolbar of the Jupyter notebook in your browser. This adds/removes the lines numbers in all notebook cells.

For me, Esc+l only added/removed the line numbers of the active cell.

edited Jan 24 '19 at 13:38

Adam Millerchip

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answered Aug 10 '17 at 13:37

yanfri

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score -3 · Answer 12 · answered Jan 30 '17 at 04:15

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1.press esc to enter the command mode 2.perss l(it L in lowcase) to show the line number

answered Jan 30 '17 at 04:15

Mo Li

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This was posted 3 years ago already https://stackoverflow.com/a/26174059/3001626 , why repost on the same thread? – David Arenburg Aug 07 '17 at 12:01

Showing line numbers in IPython/Jupyter Notebooks

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