FYI - nbformat 4.4 and colab

[willingc]

Should folks have any issues opening a notebook on Colab which was created using notebook, lab, or nteract supporting nbformat 4.4, there is an open issue on the colab repo googlecolab/colabtools#490

[blois]

The fix for this is now live in Colab.

As far as I can tell, notebook, lab and nteract are all generating nbformat 4.2 and this incompatibility should have arisen in testing. We are interested in compatibility testing with other tools generating these notebooks.

• notebook uses nbformat.v4.new_notebook:

  nbformat/nbformat/v4/nbbase.py

  Line 140 in 35a60ed

  nbformat_minor=nbformat_minor,

• lab: https://github.com/jupyterlab/jupyterlab/blob/d5539206d9d8e45d1709c56cce46dd59d2fe9d58/packages/coreutils/src/nbformat.ts#L22
• nteract: https://github.com/nteract/nteract/blob/08595712cc379dbb17797df35c543fb593e799e1/applications/jupyter-extension/nteract_on_jupyter/app/triggers/open-notebook.ts#L57

[jasongrout]

See also #138 for more discussion about notebook format version numbers.