On Tue, 2021-09-14 at 21:43 +0200, Marc-Andre Lemburg wrote:
> Hello all,
>
> I sometimes write Python scripts which need to work in specific
> work directories.
>
> When putting such code into functions, the outer function typically
> does not expect the current work dir (CWD) to be changed, so wrap the
> code which need the (possibly) modified CWD using a simply context
> manager along the lines of:
>
> class workdir:
> def __init__(self, dir):
> self.dir = dir
> def __enter__(self):
> self.curdir = os.getcwd()
> os.chdir(self.dir)
> def __exit__(self, *exc):
> os.chdir(self.curdir)
> return False
>
> Would there be interest in adding something like this to the os module
> as os.workdir() ?
>
> Example:
>
> def backup_home_dir(account):
> with os.workdir(os.path.join('/home', account)):
> # Create a backup of the account dir, rooted at the account's
> # home dir
> restic.backup(repo, '.')
>
> Notes:
> - The context manager is not thread safe. There's no thread safe model
> for the current work dir. OTOH, scripts usually don't use threads,
> so not a big deal.
> - The context manager could be made more elaborate, e.g. adding optional
> logging for debugging purposes.
> - The same could be added to pathlib's objects as .workdir() method
> returning a context manager.
>
> Thoughts ?
>
> Thanks,bpo: https://bugs.python.org/issue25625 PR: https://github.com/python/cpython/pull/28271 Filipe Laíns
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