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From: Dave Angel on 27 Apr 2010 05:26
Dodo wrote:
> Hi all,
> Under python 2.6, chr() "Return a string of one character whose ASCII
> code is the integer i." (quoted from docs.python.org)
> Under python 3.1, chr() "Return the string of one character whose
> Unicode codepoint is the integer i."
>
> I want to convert a ASCII code back to a character under python 3, not
> Unicode.
>
> How can I do that?
>
> Dorian
>
Like a lot of things, it depends on why you're asking what you are.

Characters are in Unicode on Python 3.x, by definition. That's not a
problem, it's a feature. Such a character is 16 bits, and if it's an
ASCII value, the bottom 7 bits exactly match ASCII, and the remaining
ones are zero.

However, sometimes you don't really want strings of characters, you want
an "array of 8 bit values," and you're used to the equivalence that
earlier versions of Python give you. In those cases, sometimes a string
(Unicode) works transparently, and sometimes you really want a byte
array. Simplest example is when you're calling a DLL written in another
language.

The types bytes and bytearray are considered sequences of integers (each
of range 0 to 255), rather than characters. And there are ways to
convert back and forth between those and real strings.

DaveA



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