On Sun, 27 Feb 2011 00:39:16 +1000 Nick Coghlan <ncogh...@gmail.com> wrote: > On Sat, Feb 26, 2011 at 10:52 PM, cool-RR <cool...@cool-rr.com> wrote: > > Hello, > > I noticed that the `TemporaryDirectory` context manager creates the folder > > on `__init__` rather than on `__enter__`, resulting in complexity, bugs, and > > hackarounds in `__del__`. I assume there's a good reason for this decision. > > What is it? > > >From the docstring: "This has the same behavior as mkdtemp but can be > used as a context manager." Like files, it *can* be used as a context > manager, but doesn't have to be. > > Also, the complexity wouldn't go away even if the directory creation > was delayed until the __enter__ invocation. People can still call > __enter__ directly, so __del__ would still be obliged to try to clear > things up as best it could.
Calling __enter__ directly without caring to call __exit__ afterwards should certainly be considered a user bug (not to mention of dubious utility in this case, since it's easier to spell mkdtemp() than TemporaryDirectory().__enter__()). Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
