[AstroPy] Co-ordinating Python astronomy libraries?

Mubdi Rahman rahman@astro.utoronto...
Thu Jul 8 12:55:35 CDT 2010


Just a quick question, how does the SciPy community feel about the LGPL license?

-Mubdi


----- Original Message ----
> From: James Turner <jturner@gemini.edu>
> To: Scott Ransom <sransom@nrao.edu>
> Cc: astropy@scipy.org
> Sent: Thu, July 8, 2010 1:44:20 PM
> Subject: Re: [AstroPy] Co-ordinating Python astronomy libraries?
> 
> I'm still catching up on reading this monster thread between doing
> vacation  things (thanks for all the comments, everyone)... I'll
> quickly comment on  this first.
> 
> > The Fortran version of SLALIB that I wrapped was  GPLd.  You can get the 
> > code here (SLALIB + wrappers and  tests):
> > 
> > http://www.cv.nrao.edu/~sransom/pyslalib-1.0.tar.gz
> 
> Yes, the latest  SLALIB does have an open source licence, but it's GPL,
> which will put off a  lot of the SciPy community (which may or may not
> matter in this case). Any  application that links with SLALIB will also
> need to be GPL (at least its  binaries) and the SciPy people are quite
> adamant about using BSD. I suspect  that's largely because Enthought
> has contributed a lot to SciPy and their  business model depends on
> selling the code in commercial apps. It's hard to  argue with that,
> given how central the Enthought people have been in making  SciPy and
> NumPy happen.
> 
> There is, however, an older version of SLALIB  distributed with IRAF,
> prior to JAC relicensing the library with their  changes under the GPL.
> The licensing of that is not clearly stated though, as  far as non-IRAF
> apps are concerned.
> 
> Does anyone have comments on 1)  whether people need the latest SLALIB
> (or is IRAF's version good enough?) and  2) whether we're concerned
> about licence-compatibility with SciPy for  libraries that are so
> astronomy specific? For more general stuff (eg.  deconvolution) I'd
> suggest that we should care about the licence, so we can  share code
> with other disciplines and maintain goodwill in the SciPy  community.
> 
> Cheers,
> 
> James.
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