def change_jmx(self, modifiers): test_plan_elems = { 'iterations': "${__P(iterations," + Misc.none_safe(modifiers.get('iterations')) + ")}", 'threads': "${__P(threads," + Misc.none_safe(modifiers.get('threads')) + ")}" } modify_data = {} for mod, data in modifiers.items(): if mod in test_plan_elems and data: modify_data[mod] = test_plan_elems[mod] return self.edit_jmx(modify_data)