Robert, The .py and .pyx files are identical. I copied one to the
other, and just in case I checked with diff. It's very puzzling.
Victor
On Aug 2, 8:19 pm, Robert Bradshaw <rober...@math.washington.edu>
wrote:
> On Tue, Aug 2, 2011 at 11:29 AM, William Stein <wst...@gmail.com> wrote:
> > On Tue, Aug 2, 2011 at 11:09 AM, VictorMiller <victorsmil...@gmail.com>
> > wrote:
> >> I've written a bunch of functions (some organized in classes) to do
> >> some large computations in a particular finite field (always GF(2^n)
> >> for some odd n). This seems to work fine. I'd like the computation
> >> to be as fast as possible, so the first thing I did was to copy
> >> the .py file to a .pyx file. The good news is that the compiled
> >> cython is at least 30% faster (sometimes more) than the
> >> interpreted .py version. The bad news is that it gives different
> >> results! In trying to track down where things go awry, I made the
> >> following declaration in each
>
> >> from sage.misc.decorators import sage_wrap
> >> from string import join
> >> def logged(func):
> >> @sage_wrap(func)
> >> def with_logging(*args, **kwds):
> >> print func.__name__ + '(' + join([str(_) for _ in args],',')
> >> + ')'
> >> return func(*args,**kwds)
> >> return with_logging
>
> >> I then put
> >> @logged
>
> >> in from of the defs of a bunch of functions.
>
> >> This works as expected with .py version, but when I try to compile
> >> the .pyx version I get the message:
>
> >> .... in update_wrapper
> >> setattr(wrapper, attr, getattr(wrapped, attr))
> >> AttributeError: attribute '__doc__' of 'builtin_function_or_method'
> >> objects not writable
>
> >> I think that I understand what's going on here, but are there any
>
> > You often can't use decorators with Cython code,
>
> yet...
>
> > since it is compiled (not dynamic).
>
> >> suggestions as to how to get to the bottom of the differences between
> >> the cython compiled version and the interpreted version?
>
> > Put in print statements?
>
> You could also write your own with_logging that doesn't try to access
> __name__ or __doc__ and decorate with that.
>
> I'm very curious what goes awry. Did you make any changes other than
> changing the file from .py to .pyx and compiling it?
>
> - Robert
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