On Feb 19, 2006, at 10:55 AM, Martin v. Löwis wrote:
> Stephen J. Turnbull wrote:
>> BTW, what use cases do you have in mind for Unicode -> Unicode
>> decoding?
>
> I think "rot13" falls into that category: it is a transformation
> on text, not on bytes.
The current implementation is a transformation on bytes, not text.
Conceptually though, it's a text->text transform.
> For other "odd" cases: "base64" goes Unicode->bytes in the *decode*
> direction, not in the encode direction. Some may argue that base64
> is bytes, not text, but in many applications, you can combine base64
> (or uuencode) with abitrary other text in a single stream. Of course,
> it could be required that you go u.encode("ascii").decode("base64").
I would say that base64 is bytes->bytes. Just because those bytes
happen to be in a subset of ASCII, it's still a serialization meant
for wire transmission. Sometimes it ends up in unicode (e.g. in
XML), but that's the exception not the rule.
-bob
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