How to enable line wrapping in ipython notebook

Question

I have been trying to enable line wrapping in ipython notebook. I googled it with no results and i typed ipython notebook --help in a terminal. This gives me a ton of configuration commands for a config file, but no line wrapping. Does anyone know if ipnotebook has this feature and if so how to enable it? Your help would be greatly appreciated. Thank you.

Answer 1

As @Matt pointed out you have to configure CodeMirror to enable wrapping.

However, this can be achieved by simply adding the following line to your custom.js:

 IPython.Cell.options_default.cm_config.lineWrapping = true;

So there is no need to loop through all the cells. In a similar fashion you can enable line numbers, set the indentation depth and so on (see the link posted by @Matt for other options). The location of your custom.js depends on your OS (on my Ubuntu machine it is ~/.ipython/profile_default/static/custom).

Update:

In IPython 3 the plain call does not work any more, thus it is required to place the setting within an appropriate event handler. A possible solution could look like:

define([
    'base/js/namespace',
    'base/js/events'
    ],
    function(IPython, events) {
        events.on("app_initialized.NotebookApp",
            function () {
                IPython.Cell.options_default.cm_config.lineWrapping = true;
            }
        );
    }
);