CODEWITHSUNDEEP
jupyter-notebookjupyterjupyter-labjupyterhub
michalrudko
michalrudko

Reputation: 1530

Keyboard shortcut to expand code snippets in JupyterLab

Does anyone know how to make a shortcut that would paste a certain code to the selected cell or expand a snippet into a chunk of code?
For example I would like to fill a cell with a list of useful imports when pressing something like Ctrl+Shift+M. This would expand the cell content to:
import numpy as np import pandas as pd (...) .

Optionally this could work also like text completion tools available in some IDEs. For example when I write something like:
;imp + TAB .

it would expand into the same list as above.

Any ideas how this could be defined in JupyterLab?

I saw this answer, but it does not work for me (returning javascript error)

Upvotes: 1

Views: 886

Answers (2)

krassowski
krassowski

Reputation: 15379

For emmet-style expansion of snippets in IPython, you can use:

from IPython import get_ipython

def import_completer(ipython, event):
    return [
        'import numpy as np\nimport pandas as pd\n',
        'import tensorflow as tf\nimport autokeras as ak\n'
    ]

ipython = get_ipython()
ipython.set_hook('complete_command', import_completer, re_key='.*imp')

demo

Upvotes: 0

krassowski
krassowski

Reputation: 15379

In JupyterLab 2.1+ you can add a shortcut to insert a snippet using the following settings:

{
    "shortcuts": [
        {
            "command": "apputils:run-first-enabled",
            "selector": "body",
            "keys": ["Accel Shift M"],
            "args": {
                "commands": [
                    "console:replace-selection",
                    "fileeditor:replace-selection",
                    "notebook:replace-selection",
                ],
                "args": {"text": "import numpy as np\nimport pandas as pd\n"}
            }
        }
    ]
}

For more detailed instruction see my new answer to the question you linked.

Another option is to use one of the code snippet extensions for JupyterLab:

Upvotes: 2

Related Questions