[SciPy-dev] More bugs fixed

Arnd Baecker arnd.baecker at web.de
Sun Oct 9 13:09:21 CDT 2005



On Sat, 8 Oct 2005, Robert Kern wrote:

> Arnd Baecker wrote:
>
> > Question: wouldn't it be possible to use
> > `scipy.linalg` both for "scipy core" and for "scipy full"?
> >
> > When only "scipy core" is installed,
> > scipy.linalg will just contain the basic routines,
> > and use lapack_lite (and possibly no dotblas etc.).
> >
> > When also "scipy full" is installed, scipy.linalg will
> > have the full glory of all the routines provided in present scipy.
> >
> > Technically the question is if there is
> > a way to achieve this without "scipy full" overwriting
> > files from "scipy core" (thinking of .deb/.rpm/... packages).
> >
> > Does this sound reasonable and feasible?
>
> Reasonable, yes. Feasible, not really, I don't think. At the moment, the
> scipy_core versions are "physically" under scipy.basic. In
> scipy/__init__.py, we have a block like this:
>
>     import scipy.basic.fft as fftpack
>     import scipy.basic.linalg as linalg
>     import scipy.basic.random as random
>
> So "from scipy import linalg" should work even with scipy_core. I'm not
> entirely sure if this is going to continue to work in the various
> situations where you can't overwrite stuff,


Would something like

    try:
        import scipy.THE_FULL_ONE.fft as fftpack
        import scipy.THE_FULL_ONE.linalg as linalg
        import scipy.THE_FULL_ONE.random as random
    except ImportError:
        import scipy.basic.fft as fftpack
        import scipy.basic.linalg as linalg
        import scipy.basic.random as random

work?
This assumes that the routines from
`THE_FULL_ONE` are compatible with the `basic` ones.

[...]


Best, Arnd




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