code: def sudo_remove_dirtree(dir_name):
    
    try:
      subprocess.check_output(['sudo', 'rm', '-rf', dir_name])
    except subprocess.CalledProcessError as e:
      raise WorkerError('Can''t remove directory {0}'.format(dir_name), e)
docs: Removes directory tree as a superuser.
  
    Args:
      dir_name: name of the directory to remove.
  
    This function is necessary to cleanup directories created from inside a
    Docker, since they usually written as a root, thus have to be removed as a
    root.