GAMS World Forum

Hi
I am setting up my new laptop. I have the following questions with regard to Gams-Python (Gams 30'Beta):

• When I try to install the Python 3.7 with "python setup.py install", in the API3.7 directory, I get the error message "Fatal error: Trying to install GAMS Python API 3.7 using Python.
• I have tried to run my external python version with Gams, but although I played around with the code described in one of the examples (but not in the documentation), I didn't manage to get Gams-Python running. I checked for the GMSPYTHONHOME, but I couldn't find it in my WIndows settings. So it looks like that it was not automatically generated.
  $if not setEnv GMSPYTHONHOME
  $if %gams.pySetup%==1 $abort.noError Embedded code Python not ready to be used
  $if not setEnv GMSPYTHONHOME $log --- Using external Python
  [/code]
• How can I easily get Gams to work with my external Python (I tried the tricks described in a previous post from me, but they didn't work).

Cheers
Renger

Renger,

First of all we need to distinguish between the use of the GAMS Python API and the GAMS Embedded Code Facility . While the GAMS Python API is provided for different version of Python, the Embedded Code Facility requires a Python 3.6 right now.

The error message comes from the setup.py script itself and should actually contain the Python version that you try to use for the installation. I wonder why this is missing in your error. I was for instance able to generate the following error trying to install the GAMS Python API 3.7 using a Python 3.8 interpreter:
Best,
Clemens