code: def chmod(scope, filename, mode):
      
      for file in filename:
          os.chmod(file, mode[0])
      return True
docs: Changes the permissions of the given file (or list of files)
      to the given mode. You probably want to use an octal representation
      for the integer, e.g. "chmod(myfile, 0644)".
  
      :type  filename: string
      :param filename: A filename.
      :type  mode: int
      :param mode: The access permissions.