Let me try to make the case for making JupyterLab a standard package. (1)
According to a recent post on the Jupyter blog , - JupyterLab is ready for daily use. - JupyterLab will eventually replace the classic Jupyter Notebook. - JupyterLab has been over three years in the making, with over 11,000 commits and 2,000 releases of npm and Python packages. Over 100 contributors from the broader community have helped build JupyterLab in addition to our core JupyterLab developers. See  for other posts tagged "jupyterlab" on the Jupyter blog. (2) ThebeLab  is a reimplementation of Thebe as a thin layer on top of JupyterLab (making it more sustainable), and is needed for ongoing work  to restore the possibility of making the Sage documentation live, which we had with the legacy SageNB notebook. (3) I want everybody to be able to try it out by typing sage -n jupyterlab as was allowed by , without having to first run sage -pip install jupyterlab (4) To address William's question, the dependency on Python3 is not an obstacle, since (as Dima mentioned) Python3 has been a standard package in Sage for a while now. Actually, a sage-devel discussion started on 2017-11-29 and reactivated on 2018-03-13 (today), reports amazing progress on making Sage work with Python3. (References)  [2018-02-20] JupyterLab is ready for users https://blog.jupyter.org/jupyterlab-is-ready-for-users-5a6f039b8906  posts tagged "jupyterlab" on the Jupyter blog https://blog.jupyter.org/tagged/jupyterlab  Thebelab -- turning static HTML pages into live documents https://github.com/minrk/thebelab  SageMath #24593: Upgrade from Thebe to ThebeLab for live documentation support https://trac.sagemath.org/ticket/24593  SageMath #22215: Allow "sage -n jupyterlab" https://trac.sagemath.org/ticket/22215  sage-devel discussion: A little Python 3 status update https://groups.google.com/d/topic/sage-devel/Ty-OQN7Avfc/discussion Kind regards, Samuel -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.