from scipy.optimize import minimize, Bounds def test_gh10880(): # checks that verbose reporting works with trust-constr bnds = Bounds(1, 2) opts = {'maxiter': 1000, 'verbose': 2} minimize(lambda x: x**2, x0=2., method='trust-constr', bounds=bnds, options=opts) opts = {'maxiter': 1000, 'verbose': 3} minimize(lambda x: x**2, x0=2., method='trust-constr', bounds=bnds, options=opts)