如何使用python进行tar备份

这应该工作：

import osimport tarfilehome = '/home/'backup_dir = '/backup/'home_dirs = [ name for name in os.listdir(home) if os.path.isdir(os.path.join(home, name)) ]for directory in home_dirs:    full_dir = os.path.join(home, directory)    tar = tarfile.open(os.path.join(backup_dir, directory+'.tar.gz'), 'w:gz')    tar.add(full_dir)    tar.close()