BasinHopping.py

constraint = LinearConstraint(np.ones(n_suppliers),lb=requiredOrder,ub=1000)
bnds = [(0,None) for i in range(n_suppliers)]

minimizer_kwargs = {"method": "SLSQP",
                    "bounds":bnds,
                    "constraints": constraint,
                    }
res=basinhopping(func,
                [200,200,200],
                stepsize=500,
                niter=100,
                minimizer_kwargs=minimizer_kwargs,
)

res