Fix extraction of 'kernelInfo' from the document -- fixes #3527 #3701
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This is a proposed fix for the #3527 -- it fixes the problem for me.
I wrote the code in a bit defensive manner, because I was not sure if the old code might still be correct in some cases (e.g. in case some .ipynb files are formatted in the way the code was initially written).
So I tried both options: if the old way doesn't work, then try the new structure format.
If all loaded documents are expected to be written in new format (
metadata.polyglot_notebook.kernelInfo
instead ofmetadata.kernelInfo
),then the left side of that 'or' (
||
) statement can be omitted.