On Apr 22, 2013, at 10:04 PM, Steven D'Aprano <st...@pearwood.info> wrote:
> On 23/04/13 09:16, Greg Ewing wrote: >> Victor Stinner wrote: >>> The last proposition is to add transform() and untransform() methods >>> to bytes and str types. ... If I remember >>> correctly, the missing point is how to define which types are >>> supported by a codec >> >> Also, for any given codec, which direction is "transform" >> and which is "untransform"? >> >> Also also, what's so special about base64 et al that they >> deserve an ultra-special way of invoking them, instead of >> having to import a class or function like you do for >> *every* *other* piece of library functionality? > > > As others have pointed out in the past, repeatedly, the codec system is > completely general and can transform bytes->bytes and text->text just as > easily as bytes<->text. Or indeed any bijection, as the docs for 2.7 point > out. The question isn't "What's so special about base64?" The questions > should be: > > - What's so special about exotic legacy transformations like ISO-8859-10 and > MacRoman that they deserve a string method for invoking them? > > - Why have common transformations like base64, which worked in 2.x, been > relegated to second-class status in 3.x? > > - If it is no burden to have to import a module and call an external function > for some transformations, why have encode and decode methods at all? > > > If you haven't read this, you should: > > http://lucumr.pocoo.org/2012/8/11/codec-confusion/ I may be dull, but it wasn't until I started using Python 3 that it really clicked in my head what encode/decode did exactly. In Python2 I just sort of sprinkled one or the other when there was errors until the pain stopped. I mostly attribute this to str.decode and bytes.encode not existing. > > > > > -- > Steven > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/donald%40stufft.io ----------------- Donald Stufft PGP: 0x6E3CBCE93372DCFA // 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
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