Display line numbers in IPython / Jupyter Notebooks

Question

Error reporting from most of the core kernels running in IPython / Jupyter. Laptops indicate the line along which the error occurred; but (at least by default) line numbers are not listed on laptops.

Can I add line numbers in IPython / Jupyter Notebooks?

Answer 1

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

In more detail, CTRL - M (or ESC ) will bring you to command mode, then pressing the L keys should switch the visibility of the current cell numbers. In later versions of laptops, Shift-L should switch for all cells.

If you cannot remember the shortcut, pick up the command bar Ctrl-Shift + P ( Cmd + Shift + P on Mac) and find the “line numbers”), it should allow you to switch and show you the shortcut.

Answer 2

In IPython 2.2.0, only input l (lowercase L) works in command mode (activated by pressing Esc). See [Help] - [Keyboard Shortcuts] for other shortcuts.

Alternatively, you can set the default behavior for displaying line numbers by editing custom.js .

Answer 3

Select the Toggle Line Number option in the View menu → Toggle Line Number.

The menu looks like this

Answer 4

For me, ctrl + m used to save the web page as png, so it does not work properly. But I find a different way.

The toolbar has a bottom called open the palete for commands , you can click it and enter a line, and also see the line number of the switch here.

Answer 5

To include default line numbers in all cells at startup, I recommend this link:

https://www.webucator.com/blog/2015/11/show-line-numbers-by-default-in-ipython-notebook/

I quote ...

Change to the jupyter configuration directory, which you can find by typing the following at a command prompt:

jupyter --config-dir

Open or create from there

custom

folder.

In this folder you should find the custom.js file. If it is not there, you can create it. 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; } ); } );

Answer 6

Here's how to find the active shortcut (depending on the version of the OS and laptop, it may change)

Help > Keyboard Shortcuts > toggle line numbers

On OSX running ipython3, there was ESC L

Answer 7

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

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

Answer 8

1. press esc to enter command mode 2.perss l (this is L lowercase) to show the line number