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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_id_and_model(self, id_or_model):
 """ Get both the model and ID of an object that could be an ID or a model. :param id_or_model: The object that could be an ID string or a model object. :param model_collection: The collection to which the model belongs. """

        if isinstance(id_or_model, self.collection.model):
            model = id_or_model
        elif isinstance(id_or_model, str):
            # Assume we have an ID string
            model = self.collection.get(id_or_model)
        else:
            raise TypeError('Unexpected type {}, expected {} or {}'.format(
                type(id_or_model), str, self.collection.model))

        return model.id, model