Neil Schemenauer <nas-pyt...@arctrix.com> added the comment: Welp, another day another attempt. As mentioned in the PR 4847, atexit is not the answer. If the raw/buffered file pair are part of a reference cycle and the GC cleans it before atexit runs, then the buffered data can get lost.
I attempted to implement my weakref idea (i.e. raw file keeps a weakref to the buffered file, calls flush before the raw file gets closed). That doesn't work either because the GC clears the weakref before calling __del__. The attached patch "buffer_register_flush.txt" does seem to work. The downside is that it creates a reference cycle between the raw and buffered file objects. Perhaps that is not a problem since unless you call close() on the raw file, you will be leaking resources anyhow. In the patch, calling close() removes the reference cycle. I still feel like this is worth fixing, as ugly as the implementation is. ---------- assignee: -> nascheme Added file: https://bugs.python.org/file47340/buffer_register_flush.txt _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue17852> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
