Am 25.09.2012 09:28 schrieb Steven D'Aprano:
The whole concept is incomplete at one place: self.seek(10, 2) seeks
beyond EOF, potentially creating a sparse file. This is a thing you
cannot achieve.
On the contrary, since the pos attribute is just a wrapper around seek,
you can seek beyond EOF easily:
f.pos = None
f.pos += 10
Yes, from a syscall perspective, it is different: it is a tell()
combined with a seek set instead of a relative seek. As someone
mentionned, e. g. in the case of a streamer tape this might make a big
difference.
But for anything but the most trivial usage, I would recommend sticking
to the seek method.
ACK. This should be kept as a fallback.
... or we need multiple attributes, one for each mode ...
Yes. That's what I would favourize: 3 attributes which each take a value
to be passed to seek.
So all up, I'm -1 on trying to replace the tell/seek API, and -0 on
adding a second, redundant API.
ACK.
Thomas
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