Jupyter Nbextensions Configurator

A server extension for jupyter notebookwhich provides configuration interfaces for notebook extensions (nbextensions).

The jupyter_nbextensions_configurator jupyter server extension providesgraphical user interfaces for configuring which nbextensions are enabled(load automatically for every notebook).In addition, for nbextensions which include an appropriate yaml descriptor file(see below), the interface also renders their markdown readme files, andprovides controls to configure the nbextensions' options.

This project was spun out of work fromipython-contrib/IPython-notebook-extensions.

Installation

For those using conda, you can now get jupyter_nbextensions_configurator fromthe excellent conda-forgechannel in a single command:

conda install -c conda-forge jupyter_nbextensions_configurator

For those not using conda, the installation has two steps:

1. Installing the pip package. This should be as simple as

   pip install jupyter_nbextensions_configurator
   

2. Configuring the notebook server to load the server extension. A jupytersubcommand is provided for this. You can enable the serverextension and theconfigurator nbextensions listed below for the current user with

   jupyter nbextensions_configurator enable --user
   

   The command accepts the same flags as the jupyter serverextension commandprovided by notebook versions >= 4.2, including --system to enable insystem-wide config (the default), or --sys-prefix to enable in configfiles inside python's sys.prefix, such as for a virtual environment.The provided jupyter nbextensions_configurator command can also be usedto disable.

Once installed, you'll need to restart the notebook server. Once restarted, youshould be able to find the configurator user interfaces as described below.

Usage

Once jupyter_nbextensions_configurator is installed and enabled, and yournotebook server has been restarted, you should be able to find the nbextensionsconfiguration interface at the url <base_url>nbextensions, where<base_url> is described below (for simple installs, it's usually just /, sothe UI is at /nbextensions).

base_url

For most single-user notebook servers, the dashboard (the file-browser or'tree' view) is at

http://localhost:8888/tree

So the base_url is the part between the host (http://localhost:8888) andtree, so in this case it's the default value of just /.If you have a non-default base url (such as with JupyterHub), you'll need toprepend it to the url. So, if your dashboard is at

http://localhost:8888/custom/base/url/tree

then you'll find the configurator UI page at

http://localhost:8888/custom/base/url/nbextensions

tree tab

In addition to the main standalone page, the nbextensions configuratorinterface is also available as a tab on the dashboard:

The dashboard tab is provided via an nbextension called"Nbextensions dashboard tab", with requirejs urinbextensions_configurator/tree_tab/main.Since version 0.2.0, this nbextension is enabled by default on enablingthe jupyter_nbextensions_configurator serverextension, but it can be disabledas with any other nbextension if you don't want to use it.

edit menu item

jupyter_nbextensions_configurator provides a second small nbextension, whichsimply adds an item to the notebook-view edit menu, which links to theconfigurator UI page:

Similarly to the tree tab nbextension detailed above, since version0.2.0, the edit menu item nbextension is enabled by default whenenabling the main jupyter_nbextensions_configurator serverextension, but canbe disabled at any time in the same way as other nbextensions.

YAML file format

You don't need to know about the yaml files in order simply to usejupyter_nbextensions_configurator.An nbextension is 'found' by the jupyter_nbextensions_configurator serverextension when a special yaml file describing the nbextension and its optionsis found in the notebook server's nbextensions_path.The yaml file can have any name with the file extension .yaml or .yml, anddescribes the nbextension and its options tojupyter_nbextensions_configurator.

The case-sensitive keys in the yaml file are as follows:

• Type, (required) a case-sensitive identifier, must be IPython Notebook Extension or Jupyter Notebook Extension
• Main, (required) the main javascript file that is loaded, typically main.js
• Name, the name of the nbextension
• Section, which view the nbextension should be loaded in (defaults to notebook, but can alternatively be tree, edit, or to load in all views, common).
• Description, a short explanation of the nbextension
• Link, a URL for more documentation. If this is a relative url with a .md file extension (recommended!), the markdown readme is rendered in the configurator UI.
• Icon, a URL for a small icon for the configurator UI (rendered 120px high, should preferably end up 400px wide. Recall HDPI displays may benefit from a 2x resolution icon).
• Compatibility, Jupyter major version compatibility, e.g. 3.x or 4.x, 3.x 4.x, 3.x, 4.x, 5.x
• Parameters, an optional list of configuration parameters. Each item is a dictionary with (some of) the following keys
  • name, (required) the name used to store the configuration variable in the config json. It follows a json-like structure, so you can use . to separate sub-objects e.g. myextension.buttons_to_add.play.
  • description, a description of the configuration parameter
  • default, a default value used to populate the tag in the configurator UI, if no value is found in config. Note that this is more of a hint to the user than anything functional - since it's only set in the yaml file, the javascript implementing the nbextension in question might actually use a different default, depending on the implementation.
  • input_type, controls the type of html tag used to render the parameter in the configurator UI. Valid values include text, textarea, checkbox, [html5 input tags such as number, url, color, ...], plus a final type of list
  • list_element, a dictionary with the same default and input_type keys as a Parameters entry, used to render each element of the list for parameters with input_type list
  • finally, extras such as min, step and max may be used by number tags for validation
• tags, a list of string tags describing the nbextension, to allow for filtering

Example:

Type: Jupyter Notebook Extension
Name: Limit Output
Section: notebook
Description: This nbextension limits the number of characters that can be printed below a codecell
tags:
- usability
- limit
- output
Link: readme.md
Icon: icon.png
Main: main.js
Compatibility: 4.x
Parameters:
- name: limit_output
  description: Number of characters to limit output to
  input_type: number
  default: 10000
  step: 1
  min: 0
- name: limit_output_message
  description: Message to append when output is limited
  input_type: text
  default: '**OUTPUT MUTED**'

Troubleshooting

If you encounter problems with this server extension, you can:

• check the issues page for the github repository.If you can't find one that fits your problem, please create a new one!
• ask in the project's gitter chatroom

For debugging, useful information can (sometimes) be found by:

• Checking for error messages in the browser's JavaScript console.
• Checking for messages in the notebook server's logs. This is particularlyuseful when the server is run with the --debug flag, to get as many logsas possible.

Changes

0.4.0

• Show error messages when failing to load a config file, allowing remainingfiles to load ok.
• use pip for conda recipe installation, instead of python setup.py

0.3.0

• don't use notebook.base.handlers.json_errorsfor notebook >= 5.2.0, as it's deprecated.
• auto-pad 3-char colour codes (e.g. #BEC) to 6-char, as otherwise theHTML5 controls don't initialize correctly.

0.2.8

• Split specification checking into a separate function
• Fixes for bugs in notebook 5.1.0

0.2.7

• Require newer version ofjupyter_contrib_corefor notebook 5 compatibility.

0.2.6

• Require newer version ofjupyter_contrib_corein order to ensure setting the correct config key when enabling.

0.2.5

• Deduplicate entries in nbextensions_path before checking them, to preventdisplaying duplictae entries for nbextesions in the same place. Also addtests for deduplication.
• Open yaml files using utf-8 encoding, allowing non-ascii characters,courtesy of @haobibo.
• List configurator's own nbextensions as compatible with notebook 5.x
• CI updates for 5.x testing, and working around a conda bug.

0.2.4

• Allow filtering based on name and description text as well as section & tags
• Add a clear-filter control
• Allow unconfigurable nbextensions to be 'forgotten'(enabled/disabled status erased completely)
• Allow refreshing the nbextensions list, see for details#29
• Add tooltip for parameter reset, as requested in#29
• Add IPython CodeMirror mode to markdown renderer
• Don't embed nbextensions data into the standalone /nbextensions page. Thisallows us to serve the page quicker, then get nbextensions data (slowrequest) from the json api.
• Improved log messages, with prefixes, both on client & server side
• Fix bug preventing matching first tag
• Fix bug preventing render of markdown containing unknown CodeMirror mode(s)
• Fix minor css margin issue with visible/not visible compatibility
• Make tests more robust against misleading timing-based failures
• Update jupyterhub test spawner to match hub version 0.7 api
• Update CI to use selenium 3, allowing us to test on recent firefox versions
• Add yet another new coverage argument for CI

0.2.3

• On the dashboard, select the configurator tree tab automatically if theappropriate URL hash is present
• Add filtering of visible nbextensions by names, tags and sections
• Add jupyterhub-based tests, to hopefully catch some issues relating to thejupyterhub SingleUserServer, like#11and#14in future
• README updates
• Bugfix for Enable/Disable application help strings, which both started withEnable ��

0.2.2

• Bugfix courtesy of @bielern. Fix for a bugwhich was preventing the serverextension from loading from ajupyterhub-spawned singleuser notebook server
• Alterations to the in-repo conda recipe, to use git versioning & build number

0.2.1

• Fix bug introduced in bc2f8b821b2164823cbba4e85d5e921dfd484b11, whichprevented disabling nbextensions when using notebook versions < 4.2.Add test to ensure that a disabled nbextension's js doesn't load, rather thanjust checking json config file.

0.2.0

• Use jupyter_contrib_core package for notebook compatibility shims and sometesting utilities.
• Automatically enable configurator's own nbextensions when running the app.
• Replace references to CI and other services attached to jcb91 in favour ofJupyter-contrib repository versions, where possible.

0.1.1

Remove tests dependency on ipython_genutils

0.1.0

First public release!