[Quantlib-users] setting boundary conditions in FdmBackwardSolver

[Yev <ye...@ya...>]

Hi,
I have this Python code:
    solver = ql.FdmBackwardSolver(
        ql.FdmLinearOpCompositeProxy(op),
        ql.FdmBoundaryConditionSet(),
        ql.FdmStepConditionComposite(ql.DoubleVector(), ql.FdmStepConditionVector()),
        ql.FdmSchemeDesc.CrankNicolson()
    )
How can I specify left/write boundary conditions, let's say left=1, right = 2?
It's probably in this argument: ql.FdmBoundaryConditionSet(), but I cannot figure it out.