def __missing__(self, key):
        if self.default_factory is None:
            raise KeyError(key)
        else:
            ret = self[key] = self.default_factory(name=key)
            return ret
def __add_fuzzing_range(self):
        start = self.ui.sBAddRangeStart.value()
        end = self.ui.sBAddRangeEnd.value()
        step = self.ui.sBAddRangeStep.value()
        self.fuzz_table_model.add_range(start, end + 1, step)