使用 Python 子进程模块时如何传递变量

2022-01-18 00:00:00 python python-3.x subprocess batch-file

问题描述

我正在尝试使用 python Subprocess 模块从 python 代码启用/禁用以太网连接.下面是我的代码，其中第一步是寻找可用的以太网连接"，下一步根据%interfaces%"中传递的参数启用/禁用以太网连接.

I'm trying to use python Subprocess module to enable/disable Ethernet connection from python code. Below is my code in which the first step is looking for the available "Ethernet Connections" and the next step enables/disables the ethernet connection according to the parameter passed in "%interfaces%".

for /f "skip=2 tokens=3*" %%A in ('netsh interface show interface') do set interface=%%B

netsh interface set interface %interface%  ENABLED

现在在 python 中使用时，我无法传递变量，但不确定它是否可能.仅传递如下命令按预期工作:

Now when using in python I couldn't pass the variable, not sure if it's even possible though. Passing only command as below works as expected:

import subprocess
subprocess.call('netsh interface set interface Ethernet10 ENABLED')

我想做这样的事情:

import subprocess
subprocess.call (set x = 'Ethernet0')
subprocess.call('netsh interface set interface x  ENABLED')

解决方案

subprocess.call 将列表作为参数:

subprocess.call(['netsh', 'interface', 'set', 'interface', x, 'ENABLED'])

您可以改为传递 shell=True 并且您的字符串会起作用，但这是一个安全风险，因为例如用户可以通过使用 $(command_here)

You could instead pass shell=True and your string would work, but it is a security risk, since an user could for example call another command by using $(command_here)

如果你仍然想使用字符串，你可以使用 shlex.split.

If you still want to use a string, you could use shlex.split.

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