从python执行DevCon CMD命令 [英] Executing DevCon CMD command from python

问题描述

我想从Python脚本使用DevCon重新启动驱动程序。它可以通过以下命令从命令行运行：

I want to restart driver with DevCon from python script. It works from command line with this command:

devcon restart \"sd0007322081041363_kcanv\"

我尝试过此操作：

os.system("devcon restart \"sd0007322081041363_kcanv\"")

，结果为：

'devcon' is not recognized as an internal or external command

我读到os.system已过时，我需要使用subprocess.check_output，所以我尝试这样做：

I read that os.system is obsolete and i need to use subprocess.check_output so i try this:

subprocess.check_output(['devcon', 'restart', '"sd0007322081041363_kcanv"'])

结果：

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

这：

subprocess.check_output('devcon restart "sd0007322081041363_kcanv"', shell=True)

，结果为：

subprocess.CalledProcessError: Command 'devcon restart "sd0007322081041363_kcanv"' returned non-zero exit status 1

，并且：

subprocess.Popen("devcon restart \"sd0007322081041363_kcanv\"", shell=True, stdout=subprocess.PIPE).stdout.read()

结果：

'devcon' is not recognized as an internal or external command

并这样：

try:
    subprocess.check_output('devcon disable "sd0007322081041363_kcanv" /f',shell=True,stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
    raise RuntimeError("command '{}' return with error (code {}): {}".format(e.cmd, e.returncode, e.output))

，结果为：

RuntimeError: command 'devcon disable "sd0007322081041363_kcanv" /f' return with errpr (cpde 1): 'devcon' is not recognized as an internal or external command, operable program or batch file

devcon.exe在Windows / System32下并且已在系统中设置路径。

devcon.exe is under Windows/System32 and it is set in system path.

我知道这可能是重复的问题，但是我已经尝试过许多关于stackoverflow的解决方案，但是我无法解决此问题。

I know that this can be duplicate question but I have tried many solution on stackoverflow but i van't resolve this issue.

推荐答案

最后，我想出了一个解决方案。我尝试了很多事情，但这对我有用：

Finally, I came up with a solution. I tried many things but this is what works for me:

1. 从C：\Windows\System32复制devcon.exe并将其放入C：\Windows\SysWOW64。

1. copy devcon.exe from C:\Windows\System32 and put it to C:\Windows\SysWOW64.

我的代码：

try:
    subprocess.check_output('C:\\Windows\\SysWOW64\\devcon.exe restart "sd0007322081041363_kcanv" /f',shell=True,stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
    raise RuntimeError("command '{}' return with error (code {}): {}".format(e.cmd, e.returncode, e.output))

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