def get_model(self, model_name):
        """
        Returns the model with the given case-insensitive model_name.

        Raises LookupError if no model exists with this name.
        """
        self.check_models_ready()
        try:
            return self.models[model_name.lower()]
        except __HOLE__:
            raise LookupError(
                "App '%s' doesn't have a '%s' model." % (self.label, model_name))
dataset/ETHPy150Open django/django/django/apps/config.py/AppConfig.get_model