用子进程包装 cmd.exe

发布于 2024-08-17 08:44:52 字数 314 浏览 2 评论 0原文

我尝试使用以下程序在Windows下包装cmd.exe，但它不起作用，它似乎在等待某些东西并且不显示任何内容。知道这里出了什么问题吗？

import subprocess

process = subprocess.Popen('cmd.exe', shell=False, stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=None)  
process.stdin.write("dir\r\n")  
output = process.stdout.readlines()  
print output

原文

I try to wrap cmd.exe under windows with the following program but it doesn't work , it seems to wait for something and doesn't display anything. Any idea what is wrong here ?

import subprocess

process = subprocess.Popen('cmd.exe', shell=False, stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=None)  
process.stdin.write("dir\r\n")  
output = process.stdout.readlines()  
print output

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感悟人生的甜 2024-08-24 08:44:52

通常，当尝试使用实际命令调用命令提示符时，使用“/k”参数调用它比通过标准输入传递命令更简单。也就是说，只需调用“cmd.exe /k dir”即可。例如，

from os import *
a = popen("cmd /k dir")
print (a.read())

下面的代码执行相同的操作，但缺少供您操作的字符串，因为它直接通过管道输出：

from subprocess import *
Popen("cmd /k dir")

Usually when trying to call command prompt with an actual command, it is simpler to just call it with the "/k" parameter rather than passing commands in via stdin. That is, just call "cmd.exe /k dir". For example,

from os import *
a = popen("cmd /k dir")
print (a.read())

The code below does the same thing, though lacks a string for you to manipulate, since it pipes to output directly:

from subprocess import *
Popen("cmd /k dir")

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标点 2024-08-24 08:44:52

process = subprocess.Popen('cmd.exe /k ', shell=True, stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=None)
process.stdin.write("dir\n")
o,e=process.communicate()
print o
process.stdin.close()

顺便说一句，如果你的实际任务确实是做一个目录列表，请使用Python自己的os模块，例如os.listdir()，或glob模块...等。不必要时不要调用这样的系统命令。它使您的代码不可移植。

process = subprocess.Popen('cmd.exe /k ', shell=True, stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=None)
process.stdin.write("dir\n")
o,e=process.communicate()
print o
process.stdin.close()

by the way, if your actual task is really to do a directory listing, please use Python's own os module, eg os.listdir(), or glob module... etc. Don't call system commands like that unnecessarily. It makes your code not portable.

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