On Fri, Feb 20, 2009 at 13:15, Greg Ewing <greg.ew...@canterbury.ac.nz>wrote:
> Steven D'Aprano wrote: > > Currently, if I want to verify that (say) cFoo and Foo do the same thing, >> or compare their speed, it's easy because I can import the modules >> separately. >> > > Also, won't foo.py be wasting time in most cases by > defining python versions that get overwritten? > But that's only at import time and that is rather minor compared to other execution costs. > > Instead of defining things directly in foo.py, maybe it > should do > > try: > from cFoo import * > except ImportError: > from pyFoo import * > > Then the fast path will be taken if cFoo is available, > and you can directly import cFoo or pyFoo if you want. > See the other thread I started on discussing best practices for this, but this won't work for modules where only part of the implementation has an optimized version in an extension module (e.g. pickle). -Brett
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