[Python-Dev] bytes / unicode

[Michael Foord]

On 22/06/2010 22:40, Robert Collins wrote:
> On Wed, Jun 23, 2010 at 6:09 AM, M.-A. Lemburg<mal at egenix.com>  wrote:
>
>    
>>>            return constant.encode('utf-8')
>>>
>>> So now you can write x.split(literal_as('&', x)).
>>>        
>> This polymorphism is what we used in Python2 a lot to write
>> code that works for both Unicode and 8-bit strings.
>>
>> Unfortunately, this no longer works as easily in Python3 due
>> to the literals sometimes having the wrong type and using
>> such a helper function slows things down a lot.
>>      
> I didn't work in 2 either - see for instance the traceback module with
> an Exception with unicode args and a non-ascii file path - the file
> path is in its bytes form, the string joining logic triggers an
> implicit upcast and *boom*.
>
>    
Yeah, there are still a few places in unittest where a unicode exception 
can cause the whole test run to bomb out. No-one has *yet* reported 
these as bugs and I try and ferret them out as I find them.

All the best,

Michael

>> Too bad we can't add such porting enhancements to Python2 anymore
>>      
> Perhaps a 'py3compat' module on pypi, with things like the py._builtin
> reraise helper and so forth ?
>
> -Rob
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