如何在python中获得终端输出？

How can I get terminal output in python?

提问by AssemblerGuy

I can execute a terminal command using os.system()but I want to capture the output of this command. How can I do this?

我可以使用执行终端命令，os.system()但我想捕获此命令的输出。我怎样才能做到这一点？

采纳答案by Ji?í Polcar

>>> import subprocess
>>> cmd = [ 'echo', 'arg1', 'arg2' ]
>>> output = subprocess.Popen( cmd, stdout=subprocess.PIPE ).communicate()[0]
>>> print output
arg1 arg2

>>> 

There is a bug in using of the subprocess.PIPE. For the huge output use this:

使用 subprocess.PIPE 存在错误。对于巨大的输出使用这个：

import subprocess
import tempfile

with tempfile.TemporaryFile() as tempf:
    proc = subprocess.Popen(['echo', 'a', 'b'], stdout=tempf)
    proc.wait()
    tempf.seek(0)
    print tempf.read()

回答by Sven Marnach

The recommended way in Python starting from version 3.5 is to use subprocess.run():

从 3.5 版开始，Python 中的推荐方法是使用subprocess.run()：

from subprocess import run
output = run("pwd", capture_output=True).stdout

Use the subprocessmoduleinstead.

改用subprocess模块。

from subprocess import Popen, PIPE
pipe = Popen("pwd", shell=True, stdout=PIPE).stdout
output = pipe.read()

回答by gerry

You can use Popenin subprocessas they suggest.

您可以使用POPEN中subprocess，他们建议。

with os, which is not recomment, it's like below:

with os，这不是推荐，如下所示：

import os
a  = os.popen('pwd').readlines()

回答by Mahmoud

The easiest way is to use the library commands

最简单的方法是使用库命令

import commands
print commands.getstatusoutput('echo "test" | wc')