CODEWITHSUNDEEP
pythonjupyter-notebookipythonjupyter
Markus Schanta
Markus Schanta

Reputation: 574

Jupyter notebook run all cells on open

I have a Jupyter noteboook and I'm trying to set it up in a way so that all cells are ran automatically when the notebook is opened.

This behaviour is different from saved output for notebooks which contain widgets. Widgets only seem to get rendered for me when the cells containing them are run. Consider the following example:

from IPython.display import display
from IPython.html.widgets import IntSlider

w = IntSlider()
display(w)

The slider is not displayed until the cell is executed.

Is this something that can be accomplished through Notebook Metadata or configuration files?

EDIT: https://try.jupyter.org/ seems to be doing something like this: Notice that the notebooks are not running when you open the page and display output when they are opened.

EDIT2: Adding example.

Upvotes: 17

Views: 28281

Answers (4)

András Aszódi
András Aszódi

Reputation: 9660

The Scenes Jupyterlab extension worked very well for me.

Briefly, a "scene" is a collection of cells grouped together. One of the scenes can be declared an "init" scene. Its cells will be run automatically when the notebook is opened, and this is exactly what I needed.

Additionally, the user can switch between scenes, activating/deactivating a bunch of notebook cells.

The concept comes from Mathematica. For more details please refer to the link above.

Upvotes: 2

ankostis
ankostis

Reputation: 9473

  1. Paste the snippet below in a normal(code) cell,
  2. execute it (hit [Ctrl + Enter]), and
  3. Save the notebook.

The next time you (re)load it, all cells will run and a checkpoint will be saved with their refreshed outputs.

%%html
<script>
    // AUTORUN ALL CELLS ON NOTEBOOK-LOAD!
    require(
        ['base/js/namespace', 'jquery'], 
        function(jupyter, $) {
            $(jupyter.events).on("kernel_ready.Kernel", function () {
                console.log("Auto-running all cells-below...");
                jupyter.actions.call('jupyter-notebook:run-all-cells-below');
                jupyter.actions.call('jupyter-notebook:save-notebook');
            });
        }
    );
</script>

Note that if you clear the output of the above cell, you have to repeat steps 2 and 3.

TIP

You may consider these more appropriate solutions for what you are probably trying to achieve:

  • Jupyer Thebe: embed code-snippets in static pages communicating with ipython-kernels backends.
  • nteractnteract: Build Electron-based applications from notebooks.
  • Dashboards: The "official"efforts to allow to pre-configure a grid of notebook-cell outputs ("dashboards"), package and serve them as standalone web apps.

You can find a summary of the situation in this article.

Controversy

Similar questions has been asked before in other sites, but in this googlegroup thread, someone submitted a solution, and the group moderator erased it(!), obviously to preserve life on earth :-) So, be careful with it!

Upvotes: 26

thesamovar
thesamovar

Reputation: 89

I just found a way to do this quite easily. If you install the nbextensions package (https://github.com/ipython-contrib/jupyter_contrib_nbextensions), one of the extensions is called "Initialization cells" and allows you to mark certain cells to run automatically when the notebook is loaded.

Upvotes: 5

Simon
Simon

Reputation: 10150

I don't believe this is possible.

ipython does not execute code unless it is 1) intentional and 2) trusted. Otherwise you'll run into situations where you load up notebooks that contain malicious code.

You can check details of ipythons security model here: https://ipython.org/ipython-doc/dev/notebook/security.html . Specifically the section that talks about code execution upon notebook opening: "The security problem we need to solve is that no code should execute just because a user has opened a notebook that they did not write"

While you can set explicit trust on a notebook, I'm not sure if this will then also allow automatic code execution as well. I haven't seen anything of the sort, but maybe I just haven't been looking hard enough. I've seen elsewhere that automatic code execution isn't something that's available in the core ipython package though. Check this issue here: https://github.com/ivanov/ipython-trainingwheels/issues/35

Beyond trust, another reason I suspect this isn't possible is because 1) automatic code execution will replace any existing output that is currently saved in the notebook, which may not be ideal, and 2) some notebooks may contain complex code that is computationally expensive, which you wouldn't want to be running every time you opened the notebook.

Upvotes: 3

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