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Support for upcoming knitro python package #3478

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Support for upcoming knitro python package #3478

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2fd4169
use knitroampl executable from Knitro python package if it exists
tvignon-artelys Feb 19, 2025
263fa66
format with black
tvignon-artelys Feb 19, 2025
90b683c
Merge branch 'main' into feature/support_for_knitro_python_package
mrmundt Feb 19, 2025
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16 changes: 16 additions & 0 deletions pyomo/solvers/plugins/solvers/ASL.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,13 +10,15 @@
# ___________________________________________________________________________


from pathlib import Path
import os
import subprocess

from pyomo.common import Executable
from pyomo.common.errors import ApplicationError
from pyomo.common.collections import Bunch
from pyomo.common.tempfiles import TempfileManager
from pyomo.common.fileutils import find_executable

from pyomo.opt.base import ProblemFormat, ResultsFormat
from pyomo.opt.base.solvers import _extract_version, SolverFactory
Expand All @@ -39,6 +41,20 @@ class ASL(SystemCallSolver):

def __init__(self, **kwds):
#
# If solving with knitroampl, check if Knitro Python package is installed in the same environment.
# If yes, use the knitroampl executable from the package instead of searching in PATH.
#
if 'executable' in kwds and kwds['executable'] == 'knitroampl':
candidate_knitroampl_dir = (
Path(__file__).resolve().parents[4] / 'knitro' / 'knitroampl'
)
if find_executable(
'knitroampl',
include_PATH=False,
pathlist=[str(candidate_knitroampl_dir)],
):
kwds['executable'] = str(candidate_knitroampl_dir / 'knitroampl')
#
# Call base constructor
#
if not 'type' in kwds:
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