[Debian-science-sagemath] Jupyter notebook dependency

[Dima Pasechnik]

The current Sage plan is to add different versions of iPython and
other packages like this for Python2 and Python3
(after all, there are two Python packages now...)

On Tue, Jul 23, 2019 at 9:25 AM Gordon Ball <gordon at chronitis.net> wrote:
>
> On Mon, Jul 22, 2019 at 05:17:33PM +0100, Dima Pasechnik wrote:
> > IIRC, one would also need an iPython update (which is held up by
> > iPython stopping Python2 support)
>
> For buster, we stuck with the IPython 5.x LTS series, which was the last
> to support both python 2 and 3.
>
> I expect to drop the python 2 version and hence be able upgrade to the latest
> python3 version, but there are a lot of rdepends to untangle (unlike
> jupyter-notebook, which is almost a leaf package).
>
> (See the python2-rm tracker:
> https://release.debian.org/transitions/html/python2-rm.html )
>
> >
> > On Mon, Jul 22, 2019 at 5:15 PM Ximin Luo <infinity0 at debian.org> wrote:
> > >
> > > Gordon Ball:
> > > > Sagemath currently builds the package sagemath-jupyter, which in turn
> > > > depends on python-notebook (ie, the python 2 notebook server).
> > > >
> > > > Jupyter notebook 6.0 has recently been released, which drops support for
> > > > python 2.7.
> > > >
> > > > Looking in the source for sagemath, the only place I can find where the
> > > > notebook is directly imported from is in
> > > > src/sage/repl/ipython_kernel/install.py:313, then only to test whether
> > > > the notebook server is installed. In the debian package, this file looks
> > > > superfluous to me. This suggests it should be possible to depend on the
> > > > python3 notebook server without compromising the ability to run the
> > > > custom sagemath python2 kernel. (It's possible my fairly simple search
> > > > here has missed some deeper entanglement).
> > > >
> > > > Would it be possible to change the notebook dependency so that I can
> > > > update jupyter-notebook without causing uninstallable?
> > > >
> > >
> > > This sounds reasonable, but you may want to test more deeply by building it and also running it afterwards as a user. Fancy dynamic-import tricks are possible in Python although I don't remember that Sage does any of that stuff.
> > >
> > > X
> > >
> > > --
> > > GPG: ed25519/56034877E1F87C35
> > > GPG: rsa4096/1318EFAC5FBBDBCE
> > > https://github.com/infinity0/pubkeys.git
> > >
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