[Tutor] Python Fails to Change Directory

[Steven Buroff]

Just to support Andrew, I've got several scripts that use os.chdir
and they all run fine with 3.2.3.

Steve

> -----Original Message-----
> From: tutor-bounces+sburoff=optonline.net at python.org [mailto:tutor-
> bounces+sburoff=optonline.net at python.org] On Behalf Of Steven D'Aprano
> Sent: Sunday, April 15, 2012 1:32 AM
> To: tutor at python.org
> Subject: Re: [Tutor] Python Fails to Change Directory
> 
> Andrew Jahn wrote:
> > Hi all,
> >
> > I am attempting to use a Python program to change into a specified
> > directory before executing some commands. However, when I call the
> > Python program from my Unix shell (tcsh) using a command such as
> >
> > "python myprogram.py"
> >
> > It runs without changing directory. Just to clarify, the lines of code
> > in question are the following:
> >
> > import os
> > MyDir = "/usr/local/myDir"
> > os.system("cd "+myDir)
> 
> That's not the code you are running, because it gives a NameError. Please
> copy and paste any code snippets you give, don't retype them (especially
> not from
> memory!) since you will likely introduce errors. The above error is
trivial
> to fix, but who knows what other errors you have introduced?
> 
> In any case, os.system can't help you, because that starts a new external
> process, it doesn't change the directory of the current process (your
> Python script).
> 
> 
> > I have also tried "os.chdir(MyDir)", but that doesn't work either - it
> > just runs without actually changing directory.
> 
> I find that very hard to believe. Can you explain why you think it doesn't
> change directory? Try this:
> 
> 
> import os
> print os.getcwd()
> os.chdir("/usr/local/myDir")
> print os.getcwd()
> 
> What does it print?
> 
> 
> 
> 
> --
> Steven
> 
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