I have only done this for a notebook located on my own computer.  You have 
to use "file:///" and I changed the backslashes (I'm on Windows) to forward 


The right syntax for a file URL seems to confuse people.  I think the RFCs 
aren't too clear.  "file:///" is correct - the protocol is "file", and 
there is no server (so "//server/" becomes "///").  But many programs want 
you to use "file:/c:/..."), and there can be other variants.  I just try 
all the combinations I can think of until one of them works.

Just as a reminder, this is using VR, *not* VR2.

On Sunday, March 11, 2018 at 8:35:06 AM UTC-4, Edward K. Ream wrote:
> On Saturday, March 10, 2018 at 8:26:21 PM UTC-6, Thomas Passin wrote:
> > Run the code in Jupyter Notebook. Let it finish and display the graphic, 
> then save the notebook...
> > ViewRendered will be able to show the graphic in the @jupyter node.
> Many thanks for this.  I had completely forgotten that the VR plugin 
> supports @jupyter nodes! Sheesh. gitk tells me I wrote this on 2017-01-05. 
> There is nothing in the docstring about @jupyter.  Thomas, what do you 
> paste into the body text?  A url, json or html?  Anything you can add will 
> find it's way into the docstring.
> Edward
> P.S. For my reference, the update_jupyter method does the rendering: Here 
> is the guts of the code:
> import nbformat
> from nbconvert import HTMLExporter
> from urllib.request import urlopen
> ...
> url = g.getUrlFromNode(c.p)
> if url and nbformat:
>     s = urlopen(url).read().decode()
>     try:
>         nb = nbformat.reads(s, as_version=4)
>         e = HTMLExporter()
>         (s, junk_resources) = e.from_notebook_node(nb)
>     except nbformat.reader.NotJSONError:
>         # Assume the result is html.
>         pass
> elif url:
>     s = 'can not import nbformt: %r' % url
> else:
>     s = g.u('')
> w.setHtml(s)
> Edward

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