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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 save(self, model_file, save_dir, verbose=True):
 """Save current model. :param model_file: Saved model file name. :type model_file: str :param save_dir: Saved model directory. :type save_dir: str :param verbose: Print log or not :type verbose: bool """


        # Check existence of model saving directory and create if does not exist.
        if not os.path.exists(save_dir):
            os.makedirs(save_dir)

        params = {
            "model": self.state_dict(),
            "cardinality": self.cardinality,
            "name": self.name,
            "config": self.settings,
        }

        try:
            torch.save(params, f"{save_dir}/{model_file}")
        except BaseException:
            self.logger.warning("Saving failed... continuing anyway.")

        if verbose:
            self.logger.info(f"[{self.name}] Model saved as {model_file} in {save_dir}")