I am trying out the animation thing in http://doc.sagemath.org/html/en/refer....
But Sage keep saying
Error: Neither ImageMagick nor ffmpeg appears to be installed.
And indeed
from sage.misc.sage_ostools import have_program
have_program('convert')
returns false.
But I do have ImageMagick installed by homwbrew. i.e. it works perfectly in Terminal.
What Could Possibly Go Wrong?
(macOS 10.13; Sage 8.3; Imagemagick 7.0.8.)
If you are launching Sage using a terminal, it should inherit the shell's PATH.
Are you maybe launching Sage as an app?
Setting the PATH for GUI apps can be done, see for example
Another solution might be to include the command from your temporary fix
in the init.sage file in the .sage folder in your home folder (this .sage
folder should exist; create the file init.sage if necessary).
os.environ["PATH"] += ":/usr/local/bin"
This init.sage is also a good place for putting an instruction such as
%colors Linux
which will improve the syntax highlighting color scheme in the Sage REPL if you work in a terminal with dark background. Indeed the default is
%colors LightBG
which works well for terminals with light background.
Asked: 2018-09-12 02:18:14 +0100
Seen: 869 times
Last updated: Sep 22 '18
Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
Update:
have_program('convert',path="/usr/local/bin")returns true.I temporarily solve this by
os.environ["PATH"]+=":/usr/local/bin". Looking for a permanent solution.Well, sounds to me like your ImageMagick is installed under the
/usr/localprefix so you should add that permanently to yourPATH(such as in.profileor something). On Most Linuxes/usr/local/binwill be on yourPATHby default, but I don't know about macOS.@Iguananaut I feel like there are two
PATHs. ThePATHin my terminal does contains/usr/local/bin/as I can see it if I doecho $PATH. But then the python coming with sage assumes a differentPATH, which does not contain/usr/local/, as shown byos.environ["PATH"]. I am not sure which.profileshould I fix in this case.How do you run Sage?