如何在pyomo中使用/选择/安装混合整数非线性求解器

pip install pyomo

from pyomo.environ import *
from pyomo.opt import SolverFactory

model = ConcreteModel()

# 定义变量
model.x = Var(bounds=(0, 10), domain=Reals)
model.y = Var(bounds=(0, 5), domain=NonNegativeIntegers)

# 定义目标函数
model.obj = Objective(expr=model.x**2 + model.y**2, sense=minimize)

# 定义约束条件
model.constraint = Constraint(expr=model.x + model.y >= 5)

solver = SolverFactory('gurobi')
results = solver.solve(model, tee=True) # tee=True表示显示求解过程

print("x:", value(model.x))
print("y:", value(model.y))
print("Objective:", value(model.obj))