New submission from Nikolaus Rath <[email protected]>:
I'd like to propose addding the CleanupManager class described in
http://article.gmane.org/gmane.comp.python.ideas/12447 to the contextlib
module. The idea is to add a general-purpose context manager to manage (python
or non-python) resources that don't come with their own context manager.
Example code:
with CleanupManager() als mngr:
tmpdir = tempfile.mkdtemp()
mngr.register(shutil.rmtree(tmpdir))
# do stuff with tmpdir
# shutil.rmtree() get's called automatically when the block is over
Note that mkdtemp() could of course also be changed to become its own context
manager. The idea is to provide a general facility for this kind of problem, so
it doesn't have to be reinvented whenever a module provides a ressource without
its own context manager. Other possible uses are of course ressources that are
completely external to Python,
e.g. anything allocated with a subprocess (think of
subprocess.check_call('mount'))/
I'll be happy to make a proper patch with documentation and testcases from
Jan's code. As a matter of fact, I'll probably start working out it right now,
so please let me know quickly if this doesn't have a chance of getting accepted.
----------
components: Library (Lib)
messages: 149268
nosy: Nikratio
priority: normal
severity: normal
status: open
title: Add contextlib.CleanupManager
type: feature request
versions: Python 3.3, Python 3.4
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Python tracker <[email protected]>
<http://bugs.python.org/issue13585>
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