py3: using the new tags py3 and py2 in some rst files

[fchapoton]

replacing the former "optional - py2" used there.

CC: @jdemeyer @tscrim @kiwifb @embray

Component: python3

Author: Frédéric Chapoton

Branch/Commit: 1aa0545

Reviewer: Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/24570

[fchapoton]

Commit: 1aa0545

[fchapoton]

Branch: u/chapoton/24570

[fchapoton]

New commits:

1aa0545

py3: using the new tags py2 and py3 in the rst files

[embray]

comment:2

I wonder if we can somehow make the documentation builder actually omit the #py2 or #py3 lines depending on which python the docs are being built against. Or if that's even really desirable.

[fchapoton]

comment:3

Erik, this is a bit frustrating that you alone have a branch where you can launch doctests in python3.

How far are we from having vanilla sage build and start with python3 ? I think after #24223, we will be very close but not quite there. In my opinion, we should aim to reach that state as soon as possible. And the next step would be to be able to use "sage -t" in vanilla sage+py3.

[fchapoton]

comment:4

bot is morally green

[fchapoton]

comment:5

ping ?

[embray]

comment:6

Replying to @fchapoton:

Erik, this is a bit frustrating that you alone have a branch where you can launch doctests in python3.

I don't think that's true. I'm sure I've pointed you to #24343 which has the fixes necessary for the doctest runner to work, at least I think. You can always merge that in to your local branch and try it--I'd assumed you already have been.

[fchapoton]

comment:7

could please somebody review this very easy ticket ?

[jdemeyer]

Reviewer: Jeroen Demeyer

[vbraun]

Changed branch from u/chapoton/24570 to 1aa0545