1from petsc4py import PETSc 2 3class MySNES(object): 4 5 def view(self, snes, vwr): 6 viewctx = snes.appctx 7 if viewctx is not None: 8 viewctx = 'C pointer' 9 vwr.printfASCII(f' My context: {viewctx}\n') 10