Folks, I'm not interested in rehashing this. I don't know what all the open file descriptors are. Some/many/most will have been opened by underlying C++ libraries and will not have been opened by code at the Python level. I do think the addition of an os.fsync() attempt on each file descriptor before calling os.close() makes some sense to me. Beyond that, I'm not sure there's more that can be done.
I sent my last message simply because I was surprised os.closerange() existed. I have no idea why it didn't turn up in my original searching. Skip -- https://mail.python.org/mailman/listinfo/python-list
