[Python-Dev] bytes type discussion

"Martin v. Löwis" martin at v.loewis.de
Wed Feb 15 09:03:49 CET 2006

Adam Olsen wrote:
> My assumption is these would become errors in 3.x.  bytes(str) is only
> needed so you can do bytes(u"abc".encode('utf-8')) and have it work in
> 2.x and 3.x.

I think the proposal for bytes(seq) to mean bytes(map(ord, seq))
was meant to be valid for both 2.x and 3.x, on the grounds that
you should be able to write byte string constants in the same
way in all versions.

> (I wonder if maybe they should be an error in 2.x as well.  Source
> encoding is for unicode literals, not str literals.)

Source encoding applies to the entire source code, including (byte)
string literals, comments, identifiers, and keywords. IOW, if you
declare your source encoding is utf-8, the keyword "print" must
be represented with the bytes that represent the Unicode letters
for "p","r","i","n", and "t" in UTF-8.


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