gams-dev/gamspy

Python-based algebraic modeling interface to GAMS

gamspy's Issues

Space in Model name leads to compilation error

Hi, just a small bug I encountered: Trying to solve a model whose name contains a space leads to a compilation error, but there is no clear indication that the name is invalid. Also, it should not be possible to assign an invalid name in the first place.

A small example:

from gamspy import Container, Model, Sum, Sense

c = Container()
a = c.addSet("a", records=["a"])
var = c.addVariable("v", domain=a)
eq = c.addEquation("eq", domain=a)
eq[a] = var[a] >= 1

m = Model(container=c,
          name="with space",
          problem="LP",
          equations=c.getEquations(),
          sense=Sense.MIN,
          objective=Sum(a, var[a]))

m.solve()

This leads to the following error:

GamspyException: 

================================================================================
Error Summary
================================================================================
  58  solve with space using LP MIN autogenerated_8ef7b1ba_475c_4475_b4c7_a1462bf49f70_variable;
****                 $812
**** LINE      4 INPUT       [C:\Users\<user name redacted>\AppData\Local\Temp\tmp48vx2ty7\_job_35566420-2f8b-4031-ab1b-a3f87a5830fb.gms](file:///C:/Users/<user name redacted>/AppData/Local/Temp/tmp48vx2ty7/_job_35566420-2f8b-4031-ab1b-a3f87a5830fb.gms)
**** 812  Solve keys expected - USING MAX/MIN SCENARIO


Meaning of return code 2: There was a compilation error

Can gamspy solve neural network functions trained with pytorch as the objective function？

Can gamspy solve neural network functions trained with pytorch as the objective function？the objective function like y=net(Xi), where net is trained with pytorch.

Rust bindings to read and write gdx

Sorry I write the issue here, it was intended for https://github.com/GAMS-dev/gdx/ but there is no issue board in that repo. I was wondering if you are considering the implementation of a Rust API to work with GDX files. Maybe not a full GAMS interface but at least some handling tools would be great.