Do you need to know solver status in Pyomo?
Users writing these scripts often need to make decisions based on the status or the termination condition obtained from a solver. To this aim, Pyomo provides a standardized set of objects that can be used to query solver information regardless of the solver being used.
How to solve a concrete model in Pyomo?
pyomo solve Command ¶ To solve a ConcreteModel contained in the file my_model.py using the pyomo command and the solver GLPK, use the following line in a terminal window: pyomo solve my_model.py –solver=’glpk’
How to access solver status and termination conditions?
Accessing solver status and termination conditions. Pyomo has been designed to provide high level scripting capabilities for users to quickly and easily write meta-algorithms using off the shelf solvers. Users writing these scripts often need to make decisions based on the status or the termination condition obtained from a solver.
Why does Pyomo warn when there are no constraints?
If this script is run without modification, Pyomo is likely to issue a warning because there are no constraints. The warning is because some solvers may fail if given a problem instance that does not have any constraints. As with one variable, we assume that the model has been instantiated and solved.
Is there a Pyomo solver that works for GLPK?
The below thread says it should be working, but alas, it is not. Any ideas? This answer is late but I want to share the solution that worked for me. This works for the cbc solver in coin-or but it does not work for glpk. Then I tried something different: This worked for both cbc and glpk. No idea why this works (I really didn’t do anything else).
Where can I find GLPK solver in Python?
As I use Anaconda: This was after already including the ‘glpsol’ exectuable’s folder path in my PATH variables. Reading the source code here suggests you try: For anyone that has the same issue, I found a workaround (not a solution!). I copied all the glpk files into my C:/Python27 directory, and (Surprise!) Python can now find them.