[IPython-dev] Notebook format "incompatible" changes

Matthias Bussonnier bussonniermatthias at gmail.com
Sat Nov 1 06:12:15 EDT 2014


Hello Jovyans and other beings from Jupyter galilean moons system, 


I'm writing to you to warn that on Monday (probably morning) a relatively important change
in IPython will land on master. In particular it does change the notebook structure quite a bit. 

Cf https://github.com/ipython/ipython/pull/6045 for more information. 

As nothing is ever perfect, please do back-up your notebooks before upgrading. With this new update,
saved notebook of this new of IPython version won't be compatible with 
older IPython anymore, nor will nbviewer be able to render them. 

The new notebook format will be back-ported on older (2.x) version of IPython and the new notebook format
will be supported on nbviewer, we will just need a few days to port all the changes.

There is of course be a way to manually downgrade the notebook from v4 to v3 using nbconvert.

Eventually the more adventurous can test the branch this week-end. 

As usual, be prepared for data loss and bugs, so update your git branches,
refresh submodules, clear your browser caches, roll up your sleeves, and send bug reports. 

Cheers, 
-- 
Matthias




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