code: def _expand_prefixed_files(args):
          
          for arg, _ in enumerate(args):
              if args[arg].startswith('@'):
                  try:
                      logger.debug('Attempting to read file %s', args[arg][1:])
                      with open(args[arg][1:], 'r') as f:
                          content = f.read()
                      args[arg] = content
                  except IOError:
                      # Leave arg unmodified
                      logger.debug('File Error: Failed to open %s, assume not a file', args[arg][1:])
          return args
docs: Load arguments prefixed with '@' from file as string
  
          :param args: Arguments passed from command line
          :type args: list