Hello everybody !!!
I just wanted to report here that I had received several mails from
Sage users about the class MixedIntegerLinearProgram :
They are using an old version of Sage ( probably the latest stable
version ), and downloading the packages using install_package('glpk').
The problem is that these packages are made to work with the latest
version of Sage ( at the moment, the 4.3.rc0 or a bit earlier ). An
old version of Sage + the latest package is enough to make this class
useless.
Well, this should not be a problem anymore for
MixedIntegerLinearProgram as it the new updates are
backward-compatible, but... Well :
1 - It may not always be this way
2 - This may not *only* happen for this class
Besides, the problem comes from the fact that some Sage code is
included in the packages themselves, for the good reason that after
asking this question to a lot of people, I thougth this was the best
way to do it ( some Cython code needs the libraries to be installed to
be compiled, and I found no way around it ). If you think there is a
different way, please tell me :-)
Thank you !!
Nathann
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