Keyboard shortcut to clear cell output in Jupyter notebook

Question

Does anyone know what is the keyboard shortcut to clear (not toggle) the cell output in Jupyter Notebook?

Answer 1

You can setup your own shortcut in the UI (for the latest master version):

This menu can be found in Help > Keyboard Shortcuts in any open notebook.

Answer 2

For versions less than 5:

Option 1 -- quick hack:

Change the cell type to raw then back to code: EscRY will discard the output.

Option 2 -- custom shortcut (without GUI):

For this, you need to edit the custom.js file which is typically located at ~/.jupyter/custom/custom.js (if it doesn't exist, create it).

In there, you have to add

require(['base/js/namespace']) {
    // setup 'ctrl-l' as shortcut for clearing current output
    Jupyter.keyboard_manager.command_shortcuts
           .add_shortcut('ctrl-l', 'jupyter-notebook:clear-cell-output');
}

You can add shortcut there for all the fancy things you like, since the 2nd argument can be a function (docs)

If you want mappings for other standard commands, you can dump a list of all available commands by running the following in your notebook:

from IPython.core.display import Javascript

js = """
  var jc_html = "";
  var jc_array = Object.keys(IPython.notebook.keyboard_manager.command_shortcuts.actions._actions);
  for (var i=0;i<jc_array.length;i++) {
    jc_html = jc_html + jc_array[i] + "<br >";
  }
  element.html(jc_html);
  """

Javascript(data=js, lib=None, css=None)

Answer 3

Add following at start of cell and run it:

from IPython.display import clear_output
clear_output(wait=True)

Answer 4

Just adding in for JupyterLab users. Ctrl, (advanced settings) and pasting the below in User References under keyboard shortcuts does the trick for me.

{
"shortcuts": [
        {
            "command": "notebook:hide-cell-outputs",
            "keys": [
                "H"
            ],
            "selector": ".jp-Notebook:focus"
        },
        {
            "command": "notebook:show-cell-outputs",
            "keys": [
                "Shift H"
            ],
            "selector": ".jp-Notebook:focus"
        }
    ]
}

Answer 5

Go to Help -> Edit Keyboard Shortcuts.

Then add the Shortcut you desire to the "Clear Cell" field.

Answer 6

Depends if you consider the command palette a short-cut. I do.

1. Press 'control-shift-p', that opens the command palette.
2. Then type 'clear cell output'. That will let you select the command to clear the output.

Answer 7

To delete/clear individual cell outputs in JupyterLab (without going to Edit > Clear Output), go to Settings > Advanced Settings Editor (Ctrl+,) > Keyboard Shortcuts and add this to "shortcuts":

{
  "command": "notebook:clear-cell-output",
  "keys": [
    "Shift D",
    "Shift D"
  ],
  "selector": ".jp-Notebook:focus"
}

And save it! (Ctrl + S)

Then when you are in the editor, just press Esc to escape the edit mode and press Shift + d + d.

Answer 8

You can do this via the command line: jupyter nbconvert --ClearOutputPreprocessor.enabled=True --inplace *.ipynb

Answer 9

This is not a keyboard shortcut but to clear all output you can click the following buttons:

Answer 10

I just looked and found cell|all output|clear which worked with:

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