pyomo-windows 0.0.5

Utilities to install pyomo solvers in windows without anaconda

pyomo-windows

Utilities to set up a pyomo environment in Windows. Installs glpk, ipoptand cbc solvers.

Install

In your environment, install pyomo_environment with

pip install pyomo_windows

Download solvers

Before using any solver, they must be downloaded first. You can download solvers using the DownloadSolvers class:

from pyomo_windows.solvers import DownloadSolvers
downloader = DownloadSolvers()
downloader.download_glpk()      # Download glpk
downloader.download_cbc()       # Download coin-cbc
downloader.download_ipopt()     # Download ipopt

Use solvers

Create your pyomo model and before executing it, call get_solver to get the desired solver. Remember that solver must be downloaded first as explained here.

Example:

# Create model normally
import pyomo.environ as pyo

model = pyo.ConcreteModel()
# Solve model
from pyomo_windows.solvers import SolverManager

solver_manager = SolverManager()
solver = "glpk"  # Or "cbc" or "ipopt"
opt = solver_manager.get_solver(solver)
res = opt.solve(model)
# Process your results...

Troubleshooting

You might face errors in the first execution. If in your install you cannot write in the default folder, try Optionally, if you want models to be downloaded in a different location, by passing folder to SolverManager. For example:

# Create model normally
import pyomo.environ as pyo

model = pyo.ConcreteModel()
# Solve model
from pyomo_windows.solvers import SolverManager

solver_manager = SolverManager('write a valid folder path here')
solver = "glpk"  # Or "cbc" or "ipopt"
opt = solver_manager.get_solver(solver)
res = opt.solve(model)
# Process your results...

Testing

Run tests in test_solvers.py. First execution will be slow as models have to be downloaded