How to run GAMS from python?

Question

I am trying to run a GAMS file from a python file. I am using vscode on a macbook.

So far, I have been able to open the desired GAMS file from Python using subprocess . To do this I have used the following block of code:

import subprocess
subprocess.run(['open', "/Users/tk/GAMS/sim.gms"], check=True)

However, it just opens the GAMS file but does not execute it. I need to execute the GAMS file and after the GAMS execution is complete, the python program should continue.

How do I do this? Any help is much appreciated. PS. There is a tutorial on GAMS, but I could not understand it as it seemed too complex to me.

Answer 1

I've never used gams but after a quick look at www.gams.com it sounds like /Users/tk/GAMS/sim.gms is not the file to be executed but the input file to be given as argument to the gams executable.

UG_TutorialQuickstart_RunningTheJob

So you should try something like:

import subprocess
subprocess.run(['/opt/gams/gams24.3_linux_x64_64_sfx/gams', '/Users/tk/GAMS/sim.gms'], check=True)

Notice: there is a GAMS python API which could give you a more portable solution.