从包含空格的 python 执行命令行

Question

I try to automatise an image stitching process from python using the software PTGui. I can execute the following command which works perfectly in the windows command line:

C:\Users\mw4168> "C:\Program Files\PTGui\ptgui.exe" -batch "C:\Users\mw4168\OneDrive\Desktop\PTGui Tests\3 rows\Panorama.pts" command screenshot here

However, when I try to execute this command using os.system or subprocess.run in Python:

import os
os.system("C:\Program Files\PTGui\ptgui.exe" + "-batch" +"C:\Users\mw4168\OneDrive\Desktop\PTGui Tests\3 rows\panorama.pts")

I get this error:

'C:\Program' is not recognized as an internal or external command, operable program or batch file. error screenshot here

It seems that there is an issue with the spaces within the string... Any idea on how to fix this?

Thanks a lot in advance,

Paul

Answer 1

The issue is that you're probably (as you have posted no code) not passing the C:\Program Files\PTGui\ptgui.exe as a string to the terminal but just a plain command

Use

import os
os.system('\"C:\Program Files\PTGui\ptgui.exe\" -batch')

Answer 2

Like the os.system documentation already tells you, a better solution altogether is to use subprocess instead.

subprocess.run([
    r"C:\Program Files\PTGui\ptgui.exe",
    "-batch",
    r"C:\Users\mw4168\OneDrive\Desktop\PTGui Tests\3 rows\panorama.pts"])

The string you created also lacked spaces between the indvidual arguments; but letting Python pass the arguments to the OS instead also gives you more control over quoting etc.