python 3 problem: how to convert an extension method into a class Method
Robin Becker
robin at reportlab.com
Wed Feb 27 06:28:57 EST 2013
On 27/02/2013 11:14, Peter Otten wrote:
........
> I think you misunderstood. You compare the time it takes to run the function
> coded in C and its Python equivalent -- that difference is indeed
> significant.
>
indeed. The function call overhead there looks pretty small so perhaps that's
the way forward.
> But what I was trying to measure was the difference between two ways to wrap
> the C function:
........
> I expect that you will get a similar result with your actual cfunc and
> therefore can (and should IMO) use method (1) in both Python 2 and 3
> -- but of course not being able to measure it myself it may turn out I'm
> wrong.
>
Thanks, I suspect function calls have got faster in later pythons so my fear of
the wrapper is outdated.
As others have pointed out I should probably be creating a method in C then I
should be able to do something like
class A:
def meth(self):
.....
from extension import c_dummy_class
A.meth = c_dummy_class.c_meth
--
Robin Becker
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