On Wed, Jun 23, 2010 at 4:09 AM, M.-A. Lemburg <[email protected]> wrote:
> It would be great if we could have something like the above as
> builtin method:
>
> x.split('&'.as(x))
As per my other message, another possible (and reasonably intuitive)
spelling would be:
x.split(x.coerce('&'))
Writing it as a helper function is also possible, although it be
trickier to remember the correct argument ordering:
def coerce_to(target, obj, encoding=None, errors='surrogateescape'):
if isinstance(obj, type(target)):
return obj
if encoding is None:
encoding = sys.getdefaultencoding()
try::
convert = obj.decode
except AttributeError:
convert = obj.encode
return convert(encoding, errors)
x.split(coerce_to(x, '&'))
> Perhaps something to discuss on the language summit at EuroPython.
>
> Too bad we can't add such porting enhancements to Python2 anymore.
Well, we can if we really want to, it just entails convincing Benjamin
to reschedule the 2.7 final release. Given the UserDict/ABC/old-style
classes issue, there's a fair chance there's going to be at least one
more 2.7 RC anyway.
That said, since this kind of coercion can be done in a helper
function, that should be adequate for the 2.x to 3.x conversion case
(for 2.x, the helper function can be defined to just return the second
argument since bytes and str are the same type, while the 3.x version
would look something like the code above)
Cheers,
Nick.
--
Nick Coghlan | [email protected] | Brisbane, Australia
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