如何在 Windows 上使用带有内置命令的 subprocess.Popen

问题描述

在我的旧 python 脚本中,我使用以下代码来显示 Windows cmd 命令的结果:

In my old python script, I use the following code to show the result for Windows cmd command:

print(os.popen("dir c:\").read())

正如 python 2.7 文档所说,os.popen 已过时,建议使用 subprocess.我按照以下文档进行操作:

As the python 2.7 document said os.popen is obsolete and subprocess is recommended. I follow the documentation as:

result = subprocess.Popen("dir c:\").stdout

我收到错误消息:

WindowsError: [Error 2] The system cannot find the file specified

你能告诉我使用subprocess模块的正确方法吗?

Can you tell me the correct way to use the subprocess module?


解决方案

你应该使用调用 subprocess.Popenshell=True 如下:

You should use call subprocess.Popen with shell=True as below:

import subprocess

result = subprocess.Popen("dir c:", shell=True,
                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)

output,error = result.communicate()

print (output)

关于子进程模块的更多信息.

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