Showing line numbers in IPython/Jupyter Notebooks
Frage
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 possibile to add the line numbers to IPython/Jupyter Notebooks?
Lösung
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.
Andere Tipps
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
.
Select the Toggle Line Number Option from the View -> Toggle Line Number.
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; } ); } );
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
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.
Was looking for this: Shift-L
in JupyterLab 1.0.0
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.
1.press esc to enter the command mode 2.perss l(it L in lowcase) to show the line number