On 27/01/2012 20:48, Steven D'Aprano wrote:
Eli Bendersky wrote:
try:
from __preview__ import thing
except ImportError:
import thing
So no need to target a very specific version of Python.
Yep, this is what I had in mind. And it appeared too trivial to place
it in the PEP.
Trivial and wrong.
Since thing and __preview__.thing may have subtle, or major, API
differences, how do you use it?
No, potentially wrong in cases where the APIs are different. Even with
the try...except ImportError dance around StringIO / cStringIO there are
some API differences. But for a lot of use cases it works fine
(simplejson and json aren't *identical*, but it works for most people).
Michael
try:
result = thing.foo(a, b, c) + thing.bar(x)
except AttributeError:
# Must be the preview version
result = thing.foobar(a, c, b, x)
--
http://www.voidspace.org.uk/
May you do good and not evil
May you find forgiveness for yourself and forgive others
May you share freely, never taking more than you give.
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