On 12/01/2010 12:16, Barry Warsaw wrote:
On Jan 11, 2010, at 09:57 PM, Steven Bethard wrote:
Actually there's a solution to this one too:
FooBase = Meta('FooBase', (), {})
class Foo(FooBase):
...
That should work in Python 2.X and 3.X.
Ugly, but good call! :)
There are all sorts of tricks. For example you can do exception handling
that works with pre-2.6 syntax and 3.0 with a bare except and using
sys.exc_info. It is horrible, but acceptable for short pieces of code (I
have a couple of small modules that do this).
I haven't yet tried converting larger code-bases to Python 3, but I
think the workflow advocated by Martin is greatly preferable to the
hacks and tricks needed to make the same codebase run under 2 & 3.
Michael
I've got argparse running on Python 2.3-3.1, and the changes were
pretty easy. You can see them all in the revision here:
http://code.google.com/p/argparse/source/detail?r=12
I have aspirations of putting all of the tricks I learned up up on the
Wiki somewhere, but I just haven't had the time.
The more resources we can provide people, both in code and in documentation,
the better.
Thanks!
-Barry
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