def _check_exists(self):
        """Check if the path for tarining and testing data
        exists in processed folder.

        Returns:
            raw_path (path): processed folder path
        """
        return os.path.exists(
            os.path.join(self.processed_folder, self.training_file)
        ) and os.path.exists(os.path.join(self.processed_folder, self.test_file))
Check if the path for tarining and testing data
        exists in processed folder.

        Returns:
            raw_path (path): processed folder path
        
catalyst/contrib/datasets/movielens.py