Pyomo

Because POUNCE speaks the AMPL NL/SOL protocol, it drops into Pyomo through the AMPL Solver Library interface — exactly how Pyomo drives Ipopt.

The pyomo-pounce package registers pounce as a Pyomo SolverFactory solver:

import pyomo_pounce  # registers 'pounce'
from pyomo.environ import ConcreteModel, Var, Objective, SolverFactory

model = ConcreteModel()
model.x = Var(bounds=(-10, 10))
model.obj = Objective(expr=(model.x - 3) ** 2)

solver = SolverFactory('pounce')
solver.solve(model)

Options pass through the usual Pyomo mechanism:

solver.solve(model, options={'tol': 1e-10, 'max_iter': 500})

Under the hood, Pyomo writes the model to an AMPL .nl file, invokes pounce problem.nl -AMPL, and reads the result back from the .sol file. See Running Solves for the -AMPL solver mode.