proc.py 文件源码

def ancestors(pid):
    """ancestors(pid) -> int list

    Arguments:
        pid (int): PID of the process.

    Returns:
        List of PIDs of whose parent process is `pid` or an ancestor of `pid`.
    """
    pids = []
    while pid != 0:
         pids.append(pid)
         pid = parent(pid)
    return pids