│ ```@example SciPy2
│ using Optimization, OptimizationSciPy
│ 
│ # Objective
│ obj(x, p) = (x[1] + x[2] - 1)^2
│ 
│ # Single non-linear equality: x₁² + x₂² = 1
│ cons(res, x, p) = (res .= [x[1]^2 + x[2]^2 - 1.0])
│ 
│ x0   = [0.5, 0.5]
│ prob = OptimizationProblem(
│     OptimizationFunction(obj; cons = cons),
│     x0, nothing, lcons = [0.0], ucons = [0.0])
│ 
│ sol = solve(prob, ScipyCOBYLA())
│ @show sol.u, sol.objective
│ ```
│   exception =
│    SciPy optimization failed: Python: ValueError: Constraints of type 'eq' not handled by COBYLA.