[issue10344] codecs.readline doesn't care buffering=0

[Marc-Andre Lemburg]

Marc-Andre Lemburg <mal at egenix.com> added the comment:

Amaury Forgeot d'Arc wrote:
> 
> Amaury Forgeot d'Arc <amauryfa at gmail.com> added the comment:
> 
> Antoine, should codecs.open() be removed or simply aliased to open()?

Both is not possible: codecs.open() provides a different API than
open(). Unlike open(), codecs.open() allow use of all available
codecs, not just ones that decode to Unicode.

Regarding the issue itself: I think this is a wrong interpretation of
what the buffering parameter does. File buffering is different
from .readline() buffering (which can be customized on a per-call
basis by specifying a size parameter).

Besides, switching buffering off in open() is only allowed for
binary files, so open() wouldn't "solve" the mentioned behavior.

The only way to implement "unbuffered" .readline() in the way
that Santiago appears to be after would be to set the size parameter
to 1 for all .readline() calls. That would result in very poor
performance, though.

I think we should close this issue as "won't fix".

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nosy: +lemburg

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10344>
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