[IPython-dev] notebook hangs with latest master

[Matthias Bussonnier]

Le 4 nov. 2014 à 11:23, Zoltán Vörös <zvoros at gmail.com> a écrit :

> Hi all,
> 
> I have checked out the latest code from the master branch, and run into two problems.
> 
> The first is that the notebook frontend hangs, when I try to load older (meaning 2 days old) notebooks. The bullet on the top right hand side stays solid, instead of turning empty. At that point, nothing can be done with the client, it does not respond to anything, and the notebook is not reported in the "Running" tab of the dashboard. The problem persists even, if I make the notebook trusted on the command line.

Do you get any errors on the Javascript console in the browser ? 
Are you on tornado 4? 



> 
> The other problem is a rendering issue: when I create a new notebook (this can be done without problems, and then the results can be loaded later), and I execute, say, 3*3, I get $$9$$ in the output. This happens, when I run the the server with the ipython configuration file that I attached.  Is this an issue in the kernel as such, or something in the sympyprinting extension?

Probably a bug in JS (cf above) 

> 
> These issues don't seem to be related to the browser, or the browser history: I have cleared the cache, and tried to run the notebooks in chrome and firefox. I have also run
> 
> > python setup.py submodule
> 
> Since that didn't work, I removed the whole git folder, and cloned the content again. That didn't help either. I still get an
> 
> /> running css
> />/  />/  Failed to build css sourcemaps: [Errno 2] No such file or directory
> />/  checking package data/


You might need less to build the css. But if you clone --recursive, you shouldn't ned to build anything. 


> error, when trying to build. Last time Matthias suggested python setup.py submodule, and that solved the problem, but not now.
> 
> What I also noticed is that the old notebooks have the header
> 
> {
> "metadata": {
>  "name": "",
>  "signature": "sha256:166a240702e584a760e43c90f3d1422154ca5aec932554de10f4922aaa1e517a"
> },
> "nbformat": 3,
> "nbformat_minor": 0,
> "worksheets": [
> 
> 
> while the new ones are bare; they kick out like this:
> 
> {
> "cells": [
>  {
>   "cell_type": "code",
>   "execution_count": 1,
>   "metadata": {
>    "collapsed": false
>   },
>   "outputs": [
> 
> and the metadata is moved to the end of the file, and the "worksheet" dictionary entry is removed. I wonder, whether some of the problems are related to a change in the notebook format.


This is indeed the noes notebook format. 
I though we were using an ordered dict to write file on disk, but order shouldn't matter. 


> 
> One more thing: in the toolbar, the dropdown menu for the cell type contains only code, raw, and markdown, but all the headings are gone. Is this on purpose? That would be quite bad. But this might be related to the failed css build.

Markdown cell with # on the beginning will be converted to heading cell, the UI to warn about that is not there yet. 
-- 
M


> Does someone else have the same difficulties, or something is messed up on my side?
> 
> Cheers,
> Zoltán
> 
> 
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