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Re: Why doesn't Python remember the initial directory?

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2012/8/20 Roy Smith <roy@panix.com>:
> In article <k0tf8g$adc$1@news.albasani.net>,
>  Walter Hurry <walterhurry@lavabit.com> wrote:
>
>> It is difficult to think of a sensible use for os.chdir, IMHO.
>
> It is true that you can mostly avoid chdir() by building absolute
> pathnames, but it's often more convenient to just cd somewhere and use
> names relative to that.  Fabric (a very cool tool for writing remote
> sysadmin scripts), gives you a cd() command which is a context manager,
> making it extra convenient.
>
> Also, core files get created in the current directory.  Sometimes
> daemons will cd to some fixed location to make sure that if they dump
> core, it goes in the right place.
>
> On occasion, you run into (poorly designed, IMHO) utilities which insist
> of reading or writing a file in the current directory.  If you're
> invoking one of those, you may have no choice but to chdir() to the
> right place before running them.
> --
> http://mail.python.org/mailman/listinfo/python-list


I've done quite a lot of system programming as well, and changing
directory is only a source of possible troubles in general.

If I really have to for some reasons I do this


class TempCd:
    """Change temporarily the current directory
    """
    def __init__(self, newcwd):
        self.newcwd = newcwd
        self.oldcwd = getcwd()

    def __enter__(self):
        chdir(self.newcwd)
        return self

    def __exit__(self, type, value, traceback):
        chdir(self.oldcwd)


with TempCd('/tmp'):
    # now working in /tmp

# now in the original

So it's not that hard to avoid problems..

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Why doesn't Python remember the initial directory? kj <no.email@please.post> - 2012-08-19 20:42 +0000
  Re: Why doesn't Python remember the initial directory? Giacomo Alzetta <giacomo.alzetta@gmail.com> - 2012-08-19 14:01 -0700
    Re: Why doesn't Python remember the initial directory? Nobody <nobody@nowhere.com> - 2012-08-20 01:45 +0100
      Re: Why doesn't Python remember the initial directory? Neil Hodgson <nhodgson@iinet.net.au> - 2012-08-21 11:39 +1000
  Re: Why doesn't Python remember the initial directory? Roy Smith <roy@panix.com> - 2012-08-19 17:03 -0400
    Re: Why doesn't Python remember the initial directory? kj <no.email@please.post> - 2012-08-20 01:57 +0000
      Re: Why doesn't Python remember the initial directory? Jerry Hill <malaclypse2@gmail.com> - 2012-08-19 22:05 -0400
      Re: Why doesn't Python remember the initial directory? alex23 <wuwei23@gmail.com> - 2012-08-19 19:57 -0700
        Re: Why doesn't Python remember the initial directory? alex23 <wuwei23@gmail.com> - 2012-08-19 20:04 -0700
          Re: Why doesn't Python remember the initial directory? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-20 08:11 +0100
        Re: Why doesn't Python remember the initial directory? alex23 <wuwei23@gmail.com> - 2012-08-19 20:03 -0700
        Re: Why doesn't Python remember the initial directory? alex23 <wuwei23@gmail.com> - 2012-08-19 19:59 -0700
        Re: Why doesn't Python remember the initial directory? Paul Rubin <no.email@nospam.invalid> - 2012-08-20 21:20 -0700
      Re: Why doesn't Python remember the initial directory? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-20 03:38 +0000
        Re: Why doesn't Python remember the initial directory? alex23 <wuwei23@gmail.com> - 2012-08-19 20:43 -0700
      Re: Why doesn't Python remember the initial directory? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-20 08:10 +0100
      Re: Why doesn't Python remember the initial directory? andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-20 12:56 +0100
        Re: Why doesn't Python remember the initial directory? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-20 13:14 +0000
          Re: Why doesn't Python remember the initial directory? Walter Hurry <walterhurry@lavabit.com> - 2012-08-20 13:49 +0000
            Re: Why doesn't Python remember the initial directory? Roy Smith <roy@panix.com> - 2012-08-20 09:58 -0400
              Re: Why doesn't Python remember the initial directory? andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-20 15:15 +0100
      Re: Why doesn't Python remember the initial directory? Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-08-20 16:39 +0200
      Re: Why doesn't Python remember the initial directory? Grant Edwards <invalid@invalid.invalid> - 2012-08-20 16:28 +0000
      Re: Why doesn't Python remember the initial directory? Piet van Oostrum <piet@vanoostrum.org> - 2012-08-20 16:06 -0400
      Re: Why doesn't Python remember the initial directory? John Roth <johnroth1@gmail.com> - 2012-08-21 13:35 -0700
  Re: Why doesn't Python remember the initial directory? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-19 22:18 +0100
  Re: Why doesn't Python remember the initial directory? Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-19 23:05 +0200
  Re: Why doesn't Python remember the initial directory? 88888 Dihedral <dihedral88888@googlemail.com> - 2012-08-19 17:54 -0700

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