On Wed, May 22, 2013 at 10:39:36AM -0700, William Stein wrote: > I installed the dot2tex package on https://cloud.sagemath.com, but > when I try to actually use it with this example: > > g = sage.categories.category.category_graph() > g.set_latex_options(format="dot2tex") > view(g, pdflatex=True, tightpage = True) > > I just get this error: > > RuntimeError: > dot2tex not available. > > graphviz is installed systemwide via "sudo apt-get install graphviz".
Thanks for the report. Which version of Sage? which version of the dot2tex spkg? Sage 5.10 beta requires a new dot2tex package (due to the upgrade of matplotlib); this is being resolved in #14594 (and actually the source of this discussion). > > There is plenty of code in the Sage library that only works in the > > presence of optional packages. But we ship it standard. Or shall we > > extract, e.g. the interface to Maple/Magma/... as optional packages? :-) > > Maple/Magma/etc. are not optional packages. Yup. Like graphviz they are external programs that can, or not, be provided by the user's system. > A network service that only binds to localhost doesn't need ssl. > Also, one can easily (one line) make an *ssh tunnel* to run the > notebook securely on a remote machine without installing pyopenssl. Granted, my example is not 100% bullet proof :-) I am just saying that, most of the time when you use the notebook code, you do need other stuff which is not necessarily there by default. > > An answer is that graphviz is often already installed on the system. > > In which case nothing needs to be done. > > I think graphviz has compiled code, whereas dot2tex is python code, so > graphviz could be hard to install. Yes, though it's provided precompiled on most OS, so it's not so bad. > Also relevant is that graphviz has a nasty GPL-incompatible license, > so we can never ever include it with Sage, whereas dot2tex has a very, > very standard open license: > > https://code.google.com/p/dot2tex/source/browse/LICENSE +1 Cheers, Nicolas -- Nicolas M. Thiéry "Isil" <nthi...@users.sf.net> http://Nicolas.Thiery.name/ -- 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 sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
