Changes to bools under Numexpr
Colin J. Williams
cjw at sympatico.ca
Sun Oct 29 06:55:20 EST 2006
Ivan Vilata i Balaguer wrote:
> En/na Colin J. Williams ha escrit::
>
>
>> I'm afraid I'm still baffled. Are you saying that your proposal is
>> necessary
>> to preserve compatibility with Python versions before 2.3? Otherwise, it
>> appears
>> to introduce clutter with no clear benefit.
>>
>> I don't find Numexpr in NumPy, are you referring to a scipy module?
>>
>
> From http://www.scipy.org/SciPyPackages/NumExpr:
>
> The scipy.sandbox.numexpr package supplies routines for the fast
> evaluation of array expressions elementwise by using a vector-based
> virtual machine. It's comparable to scipy.weave.blitz (in Weave),
> but doesn't require a separate compile step of C or C++ code.
>
> If your SciPy package doesn't include it, you can get a checkout from
> the repository::
>
> $ svn co http://svn.scipy.org/svn/scipy/trunk/Lib/sandbox/numexpr
>
> Numexpr is not usable under Python <= 2.4 since it uses decorators (and
> maybe for other reasons), so my proposal clearly hasn't the intention on
> Python 2.3 compatibility. Instead, it is a simplification of Numexpr's
> type system by stricter boolean types.
>
> I suggest that you try Numexpr. It is a great piece of software. Cheers,
>
> ::
>
> Ivan Vilata i Balaguer >qo< http://www.carabos.com/
> Cárabos Coop. V. V V Enjoy Data
>
>
Ivan,
Many thanks for this. It's a long time since I looked at SciPy, though
I will
look at Numexpr.
Currently, I'm focusing on Numpy.
Colin W.
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