在python脚本中运行powershell脚本，如何让python在运行时打印powershell输出

I am writing a python script which checks various conditions and runs a powershell script accordingly to help me automate migration from windows XP to windows 7. The powershell script gives its own output giving the user updates as to what is happening. I would like to take the output of the powershell script and print it as output of the python script. I have looked around at some questions which seem to want to do the same thing but they don't seem to be working for me. Initially I tried using

我正在编写一个python脚本,它检查各种条件并相应地运行一个PowerShell脚本,以帮助我自动从Windows XP迁移到Windows 7. powershell脚本提供自己的输出,为用户提供有关正在发生的事情的更新。我想获取powershell脚本的输出并将其作为python脚本的输出打印出来。我已经环顾了一些似乎想要做同样事情的问题,但它们似乎并不适合我。最初我尝试过使用

import subprocess
subprocess.call(["C:\Users\gu2124\Desktop\helloworld.ps1"])

As was suggested here Run PowerShell function from Python script but I found out that this waits for the program to execute first and does not give output so I found out I need to use subprocess.Popen() as was suggusted here Use Popen to execute a Powershell script in Python, how can I get the Powershell script's output and update it to web page? so I tried this

正如这里所建议的那样,从Python脚本运行PowerShell函数,但我发现这等待程序先执行而不提供输出,所以我发现我需要使用subprocess.Popen(),因为这里有所用使用Popen执行一个Python中的Powershell脚本,如何获取Powershell脚本的输出并将其更新到网页?所以我试过这个

import subprocess
subprocess.Popen(["C:\Users\gu2124\Desktop\helloworld.ps1"], stdout=sys.stdout)

and I get this error

我收到这个错误

Traceback (most recent call last):
  File "C:\Users\gu2124\Desktop\pstest.py", line 5, in <module>
    subprocess.Popen(["C:\Users\gu2124\Desktop\helloworld.py1"], stdout=sys.stdout)
  File "C:\Python27\lib\subprocess.py", line 701, in __init__
    errread, errwrite), to_close = self._get_handles(stdin, stdout, stderr)
  File "C:\Python27\lib\subprocess.py", line 848, in _get_handles
    c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
  File "<string>", line 523, in __getattr__
  File "C:\Program Files\PyScripter\Lib\rpyc.zip\rpyc\core\netref.py", line 150, in __getattr__
    return syncreq(self, consts.HANDLE_GETATTR, name)
  File "C:\Program Files\PyScripter\Lib\rpyc.zip\rpyc\core\netref.py", line 71, in syncreq
    return conn.sync_request(handler, oid, *args)
  File "C:\Program Files\PyScripter\Lib\rpyc.zip\rpyc\core\protocol.py", line 434, in sync_request
    raise obj

AttributeError: DebugOutput instance has no attribute 'fileno'

I'm not completely sure what this means but from what I think I understand after reading this AttributeError: StringIO instance has no attribute 'fileno' is that it is because I am messing with the stdout incorrectly. I looked a around more and I found this Why won't my python subprocess code work? where the answers said to use stdout=subprocess.PIPE so I tried this

我不完全确定这意味着什么,但是从我认为我理解后读取这个AttributeError:StringIO实例没有属性'fileno'是因为我错误地搞乱了stdout。我看了很多,我发现这为什么我的python子进程代码不起作用?答案说使用stdout = subprocess.PIPE所以我试过这个

import subprocess
subprocess.Popen(["C:\Users\gu2124\Desktop\helloworld.ps1"], stdout=subprocess.PIPE)

which also does not give me output Finally I saw this http://www.pythonforbeginners.com/os/subprocess-for-system-administrators and changed my code to this

这也没有给我输出最后我看到了这个http://www.pythonforbeginners.com/os/subprocess-for-system-administrators并将我的代码更改为此

import subprocess
p = subprocess.Popen(["powershell","C:\Users\gu2124\Desktop\helloworld.ps1"], stdout=subprocess.PIPE)
print p.communicate

I thought that it may because I am initially trying to run a powershell script from the command line so I have to open powershell first. When I type these commands directly into the command line it works the way it should but when I run it through the python script it gives this

我认为这可能是因为我最初尝试从命令行运行PowerShell脚本,所以我必须先打开PowerShell。当我直接在命令行中输入这些命令时,它按照应该的方式工作,但是当我通过python脚本运行它时,它会给出这个

<bound method Popen.communicate of <subprocess.Popen object at 0x00000000026E4A90>>

which is an improvement I guess but not the "Hello world" I was expecting. I have no idea what I should try to do next to get this to work. Any help would be greatly appreciated

这是一个改进我猜,但不是我期待的“你好世界”。我不知道接下来我应该尝试做些什么。任何帮助将不胜感激

Also if the powershell script I am using is needed here it is

此外,如果我在这里使用的powershell脚本是必需的

$strString = "Hello World"
write-host $strString

function ftest{
$test = "Test"
write-host $test
}

EDIT: I tried upgrading to python 3.3 like was suggested in the first answer but I still can't get it to work. I used the command p = subprocess.Popen(['powershell.exe', "C:\\Users\\gu2124\\Desktop\\helloworld.ps1"], stdout=sys.stdout) and am sure the file is there but am getting this error:

编辑:我尝试升级到python 3.3,就像在第一个答案中建议的那样,但我仍然无法让它工作。我使用命令p = subprocess.Popen(['powershell.exe',“C:\\ Users \\ gu2124 \\ Desktop \\ helloworld.ps1”],stdout = sys.stdout)并确定文件在那里但是我收到了这个错误:

Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    p = subprocess.Popen(['powershell.exe', "C:\\Users\\gu2124\\Desktop\\helloworld.ps1"], stdout=sys.stdout)
  File "C:\Python27\lib\subprocess.py", line 701, in __init__
    errread, errwrite), to_close = self._get_handles(stdin, stdout, stderr)
  File "C:\Python27\lib\subprocess.py", line 848, in _get_handles
    c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
UnsupportedOperation: fileno 

2 个解决方案

#1

1. Make sure you can run powershell scripts (it is disabled by default). Likely you have already done this. http://technet.microsoft.com/en-us/library/ee176949.aspx

   确保您可以运行powershell脚本(默认情况下禁用)。你可能已经这样做了。 http://technet.microsoft.com/en-us/library/ee176949.aspx

   Set-ExecutionPolicy RemoteSigned
   

2. Run this python script on your powershell script helloworld.py:

   在您的powershell脚本helloworld.py上运行此python脚本:

   # -*- coding: iso-8859-1 -*-
   import subprocess, sys
   
   p = subprocess.Popen(["powershell.exe", 
                 "C:\\Users\\USER\\Desktop\\helloworld.ps1"], 
                 stdout=sys.stdout)
   p.communicate()
   

This code is based on python3.4 (or any 3.x series interpreter), though it should work on python2.x series as well.

此代码基于python3.4(或任何3.x系列解释器),但它也适用于python2.x系列。

C:\Users\MacEwin\Desktop>python helloworld.py
Hello World

#2

I don't have Python 2.7 installed, but in Python 3.3 calling Popen with stdout set to sys.stdout worked just fine. Not before I had escaped the backslashes in the path, though.

我没有安装Python 2.7,但是在Python 3.3中调用Popen并将stdout设置为sys.stdout工作得很好。然而,在我逃离路径中的反斜杠之前。

>>> import subprocess
>>> import sys
>>> p = subprocess.Popen(['powershell.exe', 'C:\\Temp\\test.ps1'], stdout=sys.stdout)
>>> Hello World
_