如何从python执行程序?操作系统失败 [英] How do I execute a program from python? os.system fails

问题描述

我想用 os.system 运行一个命令，但出现错误

I want to run a command with os.system but i get an error

c:/fe ' is not recognized as an internal or external command, operable program or batch file

我使用的代码是

import os
os.system('"C:\\fe re\\python.exe" program "c:\\test now\\test.txt" http://site.to.explore')

如果我只运行它会起作用:

It will work if I only run:

import os
os.system('"C:\\fe re\\python.exe" program -h')

或者如果我在这样的python路径中没有空格

Or if I have no space in the python path like this

import os
os.system('C:\\fere\\python.exe program "c:\\test now\\test.txt" http://site.to.explore')

但是如果我在 python 路径和 txt 路径中的命令中有两对双引号，我会得到一个错误...

But if I have two pairs of double-quotes in the command both in python path and in txt path I get an error...

推荐答案

os.system 有一些严重的缺点，尤其是文件名中的空格和 w.r.t.安全.我建议您查看 subprocess 模块，特别是 subprocess.check_call，功能更强大.然后你可以做例如

os.system has some serious drawbacks, especially with space in filenames and w.r.t. security. I suggest you look into the subprocess module and particularly subprocess.check_call, which is much more powerful. You could then do e.g.

import subprocess
subprocess.check_call(["c:\\fe re\\python.exe", "program", etcetc...])

当然，请务必注意不要在这些调用中使用用户确定的变量，除非用户已经以相同的权限从命令行运行脚本.

Of course, make sure to take great care not to have user-determined variables in these calls unless the user is already running the script herself from the command line with the same privileges.

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