GDX2py

Read and write GAMS Data eXchange (GDX) files using Python.

Requirements

• GAMS: version 47.0 or higher
• Python: 3.8 or higher

Installing GAMS

Get GAMS from https://www.gams.com/download/ and install it to your system. No license is needed for the use of GDX libraries.

Installation

Install with

pip install gdx2py

Usage

>>> from gdx2py import GdxFile, GAMSSet, GAMSScalar, GAMSParameter
>>> with GdxFile('/path/to/gdx/file.gdx', mode='w') as gdx:
>>>     gdx['set1'] = ['a', 'b', 'c']  # Write a simple set
>>>     set1 = gdx['set1']  # Read a symbol
>>>     # Write a 2-dimensional set
>>>     gdx['set2'] = [('a', 'foo'), ('b', 'bar'), ('c', 'baz')]
>>>     # Write a scalar with explanatory text
>>>     gdx['scalar'] = GAMSScalar(3.14, expl_text="Value of pi")  
>>>     # Write a parameter with domain                                     
>>>     gdx['par1'] = GAMSParameter({'a': 1, 'b': 2,  
                                     'c': 3, 'd': 4 }, 
                                    domain=['set1'])  

Comparison to similar packages

Compared to other packages like PyGDX, gdx-pandas, gdxtools and gdxpy, GDX2py relies only on the Python standard library and the low-level GDX API gamsapi.core.gdx module which is part of the GAMS Python API (gamsapi) available on PyPI.

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This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 774629.