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,
--
Marc-Andre Lemburg
eGenix.com
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