On Tue, Feb 22, 2022 at 9:31 AM Nils Bruin <nbr...@sfu.ca> wrote: > > On Sunday, 20 February 2022 at 21:12:09 UTC-8 hohoa...@gmail.com wrote: >> >> >> Please help me to understand the function of '%auto' (is there a reference >> for sage 'magics' ?). Is '%auto' a line magic or cell magic or something >> else? >> > The very same documentation that contains the example you reference also has > an explanation right below it: > > """ > A very sharp-eyed reader will also have noticed that the previous cell had > %auto at the very top, and that it was not necessary to evaluate the cell to > use it. > > The command %auto allows us to have a cell, especially an interactive one, > all loaded up as soon as we start - particularly convenient for a classroom > situation. > > Such instructions are called percent directives . Most are documented in the > notebook help one can access at the top of any worksheet > > """ > Unfortunately, as you can see from the `lsmagics`, this "percent directive" > does not exist any more. I suspect it was part of the *old* sage notebook and > was not ported to the new jupyter notebooks that sagemath uses now. The fact > that it's referred to as a "percent directive" instead of a cell magic (as > you can see from the description, it should be a cell magic and hence be > spelled with "%%" if it were something for a jupyter notebook) is also an > indication. It should probably be removed from the documentation > > As to why it wasn't ported: it may not fit easily in the architecture of > jupyter notebooks and/or there may be notebook extensions that can already do > this through some other mechanism. If it were provided, it should be done on > the level of the python3 Ipython kernel, of which the sagemath kernel is a > derivative. >
Harald and I have also looked into this same problem: https://github.com/sagemathinc/cocalc/issues/4698 Right at the very beginning of implementing the Sage notebook in 2007, there were several minimal features/requirements that I thought were absolutely critical for anybody to actually use this thing seriously for math research, including: - ability to start computations running, close your browser, and come back and see the output - %auto cells to initialize everything It seems like these are both not available in Jupyter yet, at least by default. The first is due to some deep design decision they made in the architecture of the backend server (which has pros and cons), that they will hopefully finally fix in the next year. I don't know why auto magics aren't implemented, since it shouldn't be difficult, and solves many problems. I'll definitely do it for cocalc-jupyter soon, and it's done for sage worksheets still, of course. > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/06751199-e292-4fc5-93f5-1f6566e8926dn%40googlegroups.com. -- William (http://wstein.org) -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CACLE5GDuzZt%2BLbOjCtNax2oXmPP7VDP9H4oTBZ4oECGo8%3DL_oQ%40mail.gmail.com.
