Question

I’m working on windows vista, but I’m running python from DOS command. I have this simple python program. (It’s actually one py file named test.py)

import os
os.system('cd ..')

When I execute “python test.py” from a Dos command, it doesn’t work.
For example, if the prompt Dos Command before execution was this:

C:\Directory>

After execution, must be this:

C:\>

Help Plz.

Answer 1

First, you generally don’t want to use os.system – take a look at the subprocess module instead. But, that won’t solve your immediate problem (just some you might have down the track) – the actual reason cd won’t work is because it changes the working directory of the subprocess, and doesn’t affect the process Python is running in – to do that, use os.chdir.