code: def process_alias_export_namespace(namespace):
      
      namespace.export_path = os.path.abspath(namespace.export_path)
      if os.path.isfile(namespace.export_path):
          raise CLIError(FILE_ALREADY_EXISTS_ERROR.format(namespace.export_path))
  
      export_path_dir = os.path.dirname(namespace.export_path)
      if not os.path.isdir(export_path_dir):
          os.makedirs(export_path_dir)
  
      if os.path.isdir(namespace.export_path):
          namespace.export_path = os.path.join(namespace.export_path, ALIAS_FILE_NAME)
docs: Validate input arguments when the user invokes 'az alias export'.
  
      Args:
          namespace: argparse namespace object.