[Stackless] Compiling stackless with PyQt4?

Jeff Senn senn at maya.com
Mon Mar 26 16:06:03 CEST 2007

Yeah... this is one (of the *very few*) nits I have about the core of  

"Note that UCS2 and UCS4 Python builds are not binary compatible.  
Please keep this in mind when writing extensions or  
interfaces." (http://docs.python.org/api/unicodeObjects.html)

If you are used to windows then probably this:

"On platforms where wchar_t is available and compatible with the  
chosen Python Unicode build variant, Py_UNICODE is a typedef alias  
for wchar_t to enhance native platform compatibility."

means that (historically) most people build with UCS2 - which IMHO is  
the only sane thing to do since using
4 bytes per character for strings where 99.99% of characters need  
only 2 bytes
is a highly questionable tradeoff of memory for simplification.   
Python really needs an internal
Unicode string type that can efficiently deal with this issue (i.e.  
properly noticing UCS-embedded
surrogates)... dunno whether anyone in python-dev land is paying  
attention to this issue....

I find this: "(most recent Linux distributions come with UCS4 builds  
of Python)"
somewhat depressing...


On Mar 26, 2007, at 8:33 AM, Richard Tew wrote:

> On 3/26/07, Santiago Gala <sgala at apache.org> wrote:
>> El lun, 26-03-2007 a las 09:49 +0000, Richard Tew escribió:
>> well, the Unicode stuff is mostly because there are two different  
>> ways
>> to configure python: --enable-unicode=ucs2 (two bytes unicode chars)
>> --enable-unicode=ucs4 (4 bytes unicode chars). The API they offer for
>> external extensions is different, so you need to ensure that both  
>> python
>> and the modules are built with the same assumptions on the internal
>> unicode representation.
>> $python -c "import sys; print sys.maxunicode"
>> 1114111
>> means --> ucs4
>> ./python -c "import sys; print sys.maxunicode"
>> 65535
>> means --> ucs2
> Ah interesting.  One of the many things just using the Windows build
> hides me from I guess.
> Thanks Santiago,
> Richard.
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