[Python-Dev] PEP 332 revival in coordination with pep 349? [ Was:Re: release plan for 2.5 ?] (original) (raw)
James Y Knight foom at fuhm.net
Tue Feb 14 01:49:55 CET 2006
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On Feb 13, 2006, at 7:09 PM, Guido van Rossum wrote:
On 2/13/06, Michael Foord <fuzzyman at voidspace.org.uk> wrote:
Sorry - I meant for the unicode to bytes case. A default encoding that behaves differently to the current to implicit encodes/decodes would be confusing IMHO. And I am in agreement with you there (I think only Phillip argued otherwise).
I agree that string to bytes shouldn't change the value of the bytes. It's a deal then. Can the owner of PEP 332 update the PEP to record these decisions?
So, in python2.X, you have:
- bytes("\x80"), you get a bytestring with a single byte of value
0x80 (when no encoding is specified, and the object is a str, it
doesn't try to encode it at all). - bytes("\x80", encoding="latin-1"), you get an error, because
encoding "\x80" into latin-1 implicitly decodes it into a unicode
object first, via the system-wide default: ascii. - bytes(u"\x80"), you get an error, because the default encoding for
a unicode string is ascii. - bytes(u"\x80", encoding="latin-1"), you get a bytestring with a
single byte of value 0x80.
In py3k, when the str object is eliminated, then what do you have?
Perhaps
- bytes("\x80"), you get an error, encoding is required. There is no
such thing as "default encoding" anymore, as there's no str object. - bytes("\x80", encoding="latin-1"), you get a bytestring with a
single byte of value 0x80.
James
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