On Tue, 10 May 2022 at 03:47, Marco Sulla <marco.sulla.pyt...@gmail.com> wrote: > > On Mon, 9 May 2022 at 07:56, Cameron Simpson <c...@cskk.id.au> wrote: > > > > The point here is that text is a very different thing. Because you > > cannot seek to an absolute number of characters in an encoding with > > variable sized characters. _If_ you did a seek to an arbitrary number > > you can end up in the middle of some character. And there are encodings > > where you cannot inspect the data to find a character boundary in the > > byte stream. > > Ooook, now I understand what you and Barry mean. I suppose there's no > reliable way to tail a big file opened in text mode with a decent performance. > > Anyway, the previous-previous function I posted worked only for files > opened in binary mode, and I suppose it's reliable, since it searches > only for b"\n", as readline() in binary mode do.
It's still fundamentally impossible to solve this in a general way, so the best way to do things will always be to code for *your* specific use-case. That means that this doesn't belong in the stdlib or core language, but in your own toolkit. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
