<p>下面的代码试图在Linux中启动下面的每个“命令”。如果这两个命令中的任何一个因任何原因而崩溃,模块将尝试使它们保持运行。</p>
<pre><code>#!/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)
</code></pre>
<p>执行代码时,将引发以下异常:</p>
<pre><code>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
</code></pre>
<p>我想我遗漏了一些显而易见的东西,有人能看出上面的代码有什么问题吗?</p>