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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_follows(self, model_or_obj_or_qs):
 """ Returns all the followers of a model, an object or a queryset. """

        fname = self.fname(model_or_obj_or_qs)
        
        if isinstance(model_or_obj_or_qs, QuerySet):
            return self.filter(**{'%s__in' % fname: model_or_obj_or_qs})
        
        if inspect.isclass(model_or_obj_or_qs):
            return self.exclude(**{fname:None})

        return self.filter(**{fname:model_or_obj_or_qs})