On Mon, Nov 16, 2015 at 1:57 PM, Ludovic Courtès <l...@gnu.org> wrote: > Federico Beffa <be...@ieee.org> skribis: >> Yes, given that the back-end currently used by matploblib doesn't >> work, I would change that by using 'Tkinter'. >> >> Since you are at it, I would also change the default back-end by >> changing 'GTK3Agg' to 'TkAgg' in the following snippet: >> >> (lambda (port) >> (format port "[rc_options]~% >> backend = GTK3Agg~%"))))) > > OTOH I see that Matploblib already depends on GTK+ 3.x and > python-pygobject, so maybe it’s best to stick to GTK+ by default?
Unfortunately, the back-ends based on GTK+ are broken and I didn't manage to find how to fix the problem. http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20888 That's why I'm looking forward to get Tkinter :-) >> I'm not convinced that having 2 versions of packages (a "normal" and a >> "minimal" one) is a good idea. The reason is that you often end up >> downloading both instead of just one. As one example, I just >> downloaded 'vlc' and I noticed that it downloaded both 'cups' and >> 'cups-minimal'. Similarly, for python, anyone needing 'Tkinter' will >> end up with 2 versions in the store. > > The ‘minimal’ variants are there to break cyclic dependencies most of > the time. This is the case for cups/cups-filters and Python/Tk. > > At run time, cups indeed depends on cups-filters, which depends on > cups-minimal. In that case, as you say, we end up downloading those two > variants. But there’s not much of a choice, as was discussed during the > initial review: > > https://lists.gnu.org/archive/html/guix-devel/2015-01/msg00057.html > > Conversely, python does not depend on python-minimal. So python-minimal > is here just to break the cycle with Tk/libxcb, as noted in python.scm > and discussed in: > > http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20889 > > As for Tkinter, it is in a separate “tk” output, which users can choose > to install or not. The “tk” output contains a single file, but it pulls > in Tcl/Tk. OK. Thanks for the explanation! Regards, Fede
