ipykernel no longer supports python 2

[peteflorence]

Collecting ipykernel (from jupyter)
  Downloading https://files.pythonhosted.org/packages/11/0b/95330660f8cc5d63428b9886c800ea8d68842fd866389cf579acca4915be/ipykernel-5.1.0.tar.gz (101kB)
    Complete output from command python setup.py egg_info:
    ERROR: ipykernel requires Python version 3.4 or above.

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-fJaJGw/ipykernel/
You are using pip version 8.1.1, however version 18.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
The command '/bin/sh -c pip install --upgrade pip jupyter graphviz meshcat numpy trimesh pyglet' returned a non-zero code: 1

[peteflorence]

To clarify this breaks the docker build

[peteflorence]

I believe this is fixed by not --upgrade for jupyter. If everything works I can PR.

[gizatt]

That would be great! This hit another reponI have under CI and I've been putting off dealing with it... I'm happy to prioritize fixing it myself if its an issue.

[peteflorence]

Seems like everything works if just dont have --upgrade on jupyter

On Fri, Oct 19, 2018 at 4:37 PM Gregory Izatt notifications@github.com wrote:

That would be great! This hit another reponI have under CI and I've been putting off dealing with it... I'm happy to prioritize fixing it myself if its an issue.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/gizatt/pydrake_kuka/issues/2#issuecomment-431491733, or mute the thread https://github.com/notifications/unsubscribe-auth/AFYQqJo29B03O8Bx9hi_0VwGTus4WW1_ks5umjgHgaJpZM4XxXvs .

[gizatt]

I suspect the particular cause is that ipykernel v5.0.0 released around a month ago, and dropped Python 2.7 support. I'm waiting for CI to confirm this suspicion (just removing --upgrade doesn't fix CI, only people who have old ipykernel versions sitting around).

[gizatt]

Fixed by #3