Data Science workgroup: Difference between revisions

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+{{outdated|Other than site-wide fixes, this page has not seen recent updates.}}
+This workgroup is dedicated towards improving the state of the data science stack in Nixpkgs. This includes work on packages and modules for scientific computation, artificial intelligence and data processing, as well as data science IDEs.
+=== JupyterLab ===
+The [https://github.com/tweag/jupyterWith JupyterWith] repo "provides a Nix-based framework for the definition of declarative and reproducible Jupyter environments. These environments include JupyterLab - configurable with extensions - the classic notebook, and configurable Jupyter kernels."
+Alternatively, [https://github.com/NixOS/nixpkgs/pull/49807 there is an unmerged pull request] with work to easily deploy arbitrary kernels and jupyter extensions with nix. There are some limitations due to jupyterlab extensions relying heavily on npm and webpack to compile the javascript modules. Thus an unpure setup was considered easiest to get it working. If the pull request were merged, the following `default.nix` shell would install 20 jupyerlab extension + 4 kernels (c, python, go, and ansible). All that would need to be edited by user would be kernels, additionalExtensions, and buildInputs. The rest would be automatic and would launch a jupyterlab instance for you.
+<syntaxhighlight lang="nix">
+{ pkgs ? import <nixpkgs> {}, pythonPackages ? pkgs.python36Packages }:
+let kernels = [
+      pkgs.python36Packages.ansible-kernel
+      pythonPackages.jupyter-c-kernel
+      pkgs.gophernotes
+    ];
+    additionalExtensions = [
+      "@jupyterlab/toc"
+      "@jupyterlab/fasta-extension"
+      "@jupyterlab/geojson-extension"
+      "@jupyterlab/katex-extension"
+      "@jupyterlab/mathjax3-extension"
+      "@jupyterlab/plotly-extension"
+      "@jupyterlab/vega2-extension"
+      "@jupyterlab/vega3-extension"
+      "@jupyterlab/xkcd-extension"
+      "jupyterlab-drawio"
+      "@jupyterlab/hub-extension"
+      "jupyterlab_bokeh"
+    ];
+in
+pkgs.mkShell rec {
+  buildInputs = [
+    ### Base Packages
+    pythonPackages.jupyterlab pkgs.nodejs
-This workgroup is dedicated towards improving the state of the data science stack in Nixpkgs. This includes work on packages and modules for scientific computation, artificial intelligence and data processing, as well as data science IDEs.
+    ### Extensions
+    pythonPackages.ipywidgets
+    pythonPackages.ipydatawidgets
+    pythonPackages.ipywebrtc
+    pythonPackages.pythreejs
+    pythonPackages.ipyvolume
+    pythonPackages.jupyterlab-git
+    pythonPackages.jupyterlab-latex
+    pythonPackages.ipyleaflet
+    pythonPackages.ipympl
+  ] ++ kernels;
+  shellHook = ''
+    TEMPDIR=$(mktemp -d -p /tmp)
+    mkdir -p $TEMPDIR
+    cp -r ${pkgs.python36Packages.jupyterlab}/share/jupyter/lab/* $TEMPDIR
+    chmod -R 755 $TEMPDIR
+    echo "$TEMPDIR is the app directory"
+    # kernels
+    export JUPYTER_PATH="${pkgs.lib.concatMapStringsSep ":" (p: "${p}/share/jupyter/") kernels}"
+# labextensions
+${pkgs.lib.concatMapStrings
+     (s: "jupyter labextension install --no-build --app-dir=$TEMPDIR ${s}; ")
+     (pkgs.lib.unique
+       ((pkgs.lib.concatMap
+           (d: pkgs.lib.attrByPath ["passthru" "jupyterlabExtensions"] [] d)
+           buildInputs) ++ additionalExtensions))  }
+jupyter lab build --app-dir=$TEMPDIR
+# start jupyterlab
+jupyter lab --app-dir=$TEMPDIR
+  '';
+}
+</syntaxhighlight>
-There have been some great examples of great work done on libraries:
+Some recent examples of work done on libraries:
 * [https://github.com/NixOS/nixpkgs/pulls?utf8=%E2%9C%93&q=is%3Apr+nlp+ nlp]
@@ Line 9: / Line 81: @@
- As well as notable work on the data science infra :
+There has also been notable work on the data science infra :
 * [https://github.com/NixOS/nixpkgs/pulls?utf8=%E2%9C%93&q=is%3Apr+jupyter Jupyter]
@@ Line 15: / Line 87: @@
 * [https://github.com/NixOS/nixpkgs/pulls?utf8=%E2%9C%93&q=is%3Apr+jupyterhub Jupyterhub]
-with such highlights as @aborsu's [https://github.com/aborsu/nixpkgs/blob/22ef965da38cc5e3457fe2d848b8a789cb6ad207/nixos/modules/services/development/jupyter/default.nix Jupyter kernels written in Nix]:
+with such highlights as [https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/development/jupyter/default.nix Jupyter kernels written in Nix]:
 {{file|./modules/datasci.nix|nix|<nowiki>
@@ Line 53: / Line 126: @@
 == Channels ==
-[irc://irc.freenode.net/nixos-data ''#nixos-data'' on Freenode]
+[https://matrix.to/#/#datascience:nixos.org #datascience:nixos.org on Matrix]
 == People ==
 [[User:Ixxie|Ixxie]]