Python 运行 shell 获取输出结果的实例_Python

首先使用内置模块os.

				?

									>>> import os

									>>> code = os.system("pwd && sleep 2")

									# /User/zhipeng

									>>> print code

									# 0

问题是 os.system 只能获取到结束状态

使用内置模块 subprocess

									>>> import subprocess

									>>> subprocess.Popen("pwd && sleep 2", shell=True, cwd="/home")

									# <subprocess.Popen object at 0x106498310>

									# /home

									>>> sub = subprocess.Popen("pwd && sleep 2", shell=True, stdout=subprcess.PIPE)

									>>> sub.wait()

									>>> print sub.stdout.read()

									# /User/zhipeng

				?

									subprocess.Popen还支持一些别的参数 

									bufsize,executable=None, stdin=None, stdout=None, stderr=None

									preexec_fn=None, close_fds=False, shell=False, cwd=None, env=None

									universal_newlines=False, startupinfo=None, creationflags=0

使用第三方模块 sh

									# pip install sh

									>>> from sh import ifconfig

									>>> print ifconfig("eth0")

									>>> from sh import bash

									>>> bash("pwd")

									Traceback (most recent call last):

									 File "<stdin>", line 1, in <module>

									 File "/Library/Python/2.7/site-packages/sh.py", line 1021, in __call__

									 return RunningCommand(cmd, call_args, stdin, stdout, stderr)

									 File "/Library/Python/2.7/site-packages/sh.py", line 486, in __init__

									 self.wait()

									 File "/Library/Python/2.7/site-packages/sh.py", line 500, in wait

									 self.handle_command_exit_code(exit_code)

									 File "/Library/Python/2.7/site-packages/sh.py", line 516, in handle_command_exit_code

									 raise exc(self.ran, self.process.stdout, self.process.stderr)

									sh.ErrorReturnCode_126: 

									 RAN: '/bin/bash ls'

									 STDOUT:

									 STDERR:

									/bin/ls: /bin/ls: cannot execute binary file

									# 不能这么用

									>>> from sh import ls

									>>> ls()

									# hello.txt 1.txt

									# ls -al

									>>> ls(a=True, l=True)

									# ls(al=True) 是不可以的

这操作太复杂了, 项目中使用也太糟心了, 也没有办法多个命令同时用.不过可以用别的方式代替

				?

									# bash -c command 可以很好的解决这个问题

									# bash -c "sleep 1 && pwd"

									>>> result = bash(c="pwd", _timeout=1, _cwd="/home")

									>>> print result

									# -rw-r--r--@ 1 zhipeng staff 0 10 13 18:30 hello.txt

									# -rw-r--r--@ 1 zhipeng staff 0 10 13 18:30 1.txt

									>>> result = bash(c="pwd", _timeout=1, _cwd="/")

									>>> print result

									# /

									>>> bash(c="pwd && sleep 2", _timeout=1)

									Traceback (most recent call last):

									 File "<stdin>", line 1, in <module>

									 File "/Library/Python/2.7/site-packages/sh.py", line 1021, in __call__

									 return RunningCommand(cmd, call_args, stdin, stdout, stderr)

									 File "/Library/Python/2.7/site-packages/sh.py", line 486, in __init__

									 self.wait()

									 File "/Library/Python/2.7/site-packages/sh.py", line 498, in wait

									 raise TimeoutException(-exit_code)

									sh.TimeoutException

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									参数里面可以添加非命令参数. 需要以_开头, 例如上面的_timeout, _cwd. 详见sh.py 源码 

									还支持以下参数 

									internal_bufsize, err_bufsize, tee, done, in, decode_errors, tty_in, 

									out, cwd, timeout_signal, bg, timeout, with, ok_code, err, env, no_out,

参考：

https://github.com/amoffat/sh/blob/master/sh.py
https://github.com/amoffat/sh

以上这篇Python 运行 shell 获取输出结果的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/u012731379/article/details/78856318

Python 运行 shell 获取输出结果的实例

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