[SciPy-dev] Blitz license request for SciPy

Jarrod Millman millman@berkeley....
Sun Apr 20 03:14:34 CDT 2008

Hello Todd,

Thanks very much for Blitz and for allowing us to include it in SciPy
with a BSD license.  I plan to go ahead and replace the GNU GPL
license with the revised BSD license.  I have cced the SciPy
developer's list, so that we have a public record of your permission
for us to make this change.


Jarrod Millman
Computational Infrastructure for Research Labs
10 Giannini Hall, UC Berkeley
phone: 510.643.4014

On Tue, Mar 25, 2008 at 11:55 AM, Todd Veldhuizen <tveldhui@gmail.com> wrote:
> I have no objections to releasing it under a BSD license.
>  best
>  Todd
>  On 21/03/2008, Jarrod Millman <millman@berkeley.edu> wrote:
>  > Julian and Todd,
>  >
>  >  I'm writing to see if we can get an exception to the Blitz license so
>  >  that it can be released with a BSD license within SciPy.  Currently,
>  >  the Fedora project is classifying the entire SciPy package as GPLed
>  >  because one package, scipy.weave, uses blitz. (the rest of the code is
>  >  all BSD).  We were about to launch into the re-factoring step to make
>  >  the blitz portion optional, when it occurred to us to just ask you
>  >  guys first. :-)
>  >
>  >  Blitz is included in the scipy.weave package which allows you to
>  >  inline C/C++ within Python.  Users have the option of converting NumPy
>  >  arrays to blitz arrays for use in C++.  There is also a function
>  >  (weave.blitz) that will automatically convert NumPy expressions in
>  >  Python to Blitz expressions in C++.  Often this shows notable speed
>  >  improvements.  Our re-factoring step will require us to split the
>  >  blitz code into the blitz and non-blitz portions.  This is a bit of a
>  >  pain, and ends up with more installation issues than if we didn't do
>  >  it.
>  >
>  >  Thanks for your consideration,
>  >
>  >  --
>  >  Jarrod Millman

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