在执行使用Python subprocess.Popen shell脚本？ [英] executing shell script using subprocess.Popen in Python?

问题描述

我试图从Python程序执行shell脚本。而不是使用 subprocess.call ，我使用 subprocess.Popen ，因为我想看到的外壳输出脚本，如果有的话，同时在执行一个变量的shell脚本错误。

I am trying to execute shell script from the Python program. And instead of using subprocess.call, I am using subprocess.Popen as I want to see the output of the shell script and error if any while executing the shell script in a variable.

#!/usr/bin/python

import subprocess
import json
import socket
import os

jsonStr = '{"script":"#!/bin/bash\\necho Hello world\\n"}'
j = json.loads(jsonStr)

shell_script = j['script']

print shell_script

print "start"
proc = subprocess.Popen(shell_script, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(stdout, stderr) = proc.communicate()
if stderr:
   print "Shell script gave some error"
   print stderr
else:
   print stdout
   print "end" # Shell script ran fine.

但上面的code，每当我跑，我总是得到错误这样的 -

But the above code whenever I am running, I am always getting error like this -

Traceback (most recent call last):
  File "hello.py", line 29, in <module>
    proc = subprocess.Popen(shell_script, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1308, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

任何想法错了，我在这里做什么？

Any idea what wrong I am doing here?

推荐答案

要执行给定为字符串的任意shell脚本，只需添加壳= TRUE 参数。

To execute an arbitrary shell script given as a string, just add shell=True parameter.

#!/usr/bin/env python
from subprocess import call
from textwrap import dedent

call(dedent("""\
    #!/bin/bash
    echo Hello world
    """), shell=True)

这篇关于在执行使用Python subprocess.Popen shell脚本？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！