Python OSError : [Errno 2]

Question

我有以下代码试图在 Linux 中启动下面的每个“命令”。如果两个命令中的任何一个因任何原因崩溃，该模块会尝试保持每个命令都运行。

#!/usr/bin/env python
import subprocess

commands = [ ["screen -dmS RealmD top"], ["screen -DmS RealmD top -d 5"] ]
programs = [ subprocess.Popen(c) for c in commands ]
while True:
    for i in range(len(programs)):
        if programs[i].returncode is None:
            continue # still running
        else:
            # restart this one
            programs[i]= subprocess.Popen(commands[i])
        time.sleep(1.0)

执行代码时会抛出以下异常:

Traceback (most recent call last):
  File "./marp.py", line 82, in <module>
    programs = [ subprocess.Popen(c) for c in commands ]
  File "/usr/lib/python2.6/subprocess.py", line 595, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1092, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

我想我遗漏了一些明显的东西，有人能看出上面的代码有什么问题吗？

Answer 1

使用 ["screen", "-dmS", "RealmD", "top"]而不是 ["screen -dmS RealmD top"] .

也可以使用 screen 的完整路径.