Notebook Validation Failed

[ruxi]

For juypter notebook version 4.0.4 with python3 kernel, using %version_information prompts an 'Notebook validation failed' message when page is reloaded.

The issue is cosmetic

[jrjohansson]

Thanks for reporting this. Looks like a rather annoying problem. Will try to reproduce and fix this. Does it happen with all notebooks with a version_information table?

[ruxi]

Does it happen with all notebooks with a version_information table?

Yes, the problem was reproduced every time the version_information table was added to a notebook. Thanks for making this great extension!

[ruxi]

The 'validation failed' prompt doesn't occur when the kernel is switch to python2.

[jrjohansson]

I have not been able to reproduce this with the most recent ipython/jupyter/notebook for anaconda. Does it happen for newly created notebooks or old notebooks? If possible can you upload a notebook book with this problem as a gist or so?

[ruxi]

I have not been able to reproduce this with the most recent ipython/jupyter/notebook for anaconda. Does it happen for newly created notebooks or old notebooks?

I used `pip install ipython[all]' for the installation. The error occurred for both newly created and old notebooks. The minimal code needed was:

%load_ext version_information
%version_information

I tried reproducing the problem on my home PC to no avail. Between the two systems there are differences in the kernel (38 vs 33) OS version (Mint 17.2 vs 17.1) among other things. Will try upgrading to see if it'll fix it.

If possible can you upload a notebook book with this problem as a gist or so?

Sure, I'll upload it the next time I'm on that machine.

[ruxi]

https://gist.github.com/ruxi/7c85bccbec8293a7d332#file-verion-ipynb