[AstroPy] question re specutils

Aycha Tammour aycha.tammour at gmail.com
Thu Sep 18 16:44:48 EDT 2014


Hi all and thanks for the feedback! Upgrading my cython fixed the problem.

Cheers,
Aycha

On Thu, Sep 18, 2014 at 4:15 PM, Thomas Robitaille <
thomas.robitaille at gmail.com> wrote:

> Hi Wolfgang,
>
> Thanks for clarifying this! Are there plans for a 0.1 release, since
> this would make it easier for people to try it out?
>
> Cheers,
> Tom
>
> Wolfgang Kerzendorf wrote:
> > Hi Aycha,
> >
> > Erik B. has already given a relatively good instruction how to install
> > specutils. As Tom R. said there has not been an official release of
> > specutils, however it is ready for science (and is also being used for
> > that ;-) ). Obviously it depends on what the science you want to do.
> > Kyle et al. has written the extinction part and documentation and it is
> > mostly ready for consumption (I used it a couple of times).
> >
> > It is pretty clearly laid out in the document that Erik sent
> > (
> http://docs.astropy.org/en/stable/install.html#obtaining-the-source-packages
> )
> >  of what to do -- including the need to install cython.
> >
> > Let us know how it goes,
> >     Wolfgang
> >
> > On Thu, Sep 18, 2014 at 1:39 PM, Thomas Robitaille
> > <thomas.robitaille at gmail.com <mailto:thomas.robitaille at gmail.com>>
> wrote:
> >
> >     Hi Aycha,
> >
> >     Just to echo what Erik Bray said, there hasn't actually been a
> specutils
> >     release yet, so in addition to meaning that it is a bit harder to
> >     install, the package may not be ready for 'science' use yet (and the
> API
> >     may not be stable).
> >
> >     Maybe Wolfgang or someone else involved in specutils can give an
> update
> >     on the current status?
> >
> >     Cheers,
> >     Tom
> >
> >     Aycha Tammour wrote:
> >     > Erik,
> >     >
> >     > pip install specutils was not able to install the package (No
> >     > distributions at all found for specutils) even when I tried
> >     > --allow-unvirified and --allow-external.
> >     >
> >     > Although pip search specutils seemed to find the package.
> >     >
> >     > I tried installing from source on a MAC and a unix machine and got
> >     error
> >     > messages about cythoning some file (code.py, I think).
> >     >
> >     > Best,
> >     > Aycha
> >     >
> >     > On Wed, Sep 17, 2014 at 4:40 PM, Erik Bray <embray at stsci.edu
> >     <mailto:embray at stsci.edu>
> >     > <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>> wrote:
> >     >
> >     >     On 09/17/2014 11:46 AM, Aycha Tammour wrote:
> >     >     > Thanks Erik. This makes sense but there is actually a
> >     >     setup_package.py file in
> >     >     > the directory which I used to install specutils with
> >     >     >
> >     >     > python setup_package.py install
> >     >     >
> >     >     > Nothing showed on my terminal which seems a bit suspicious.
> >     >
> >     >     setup_package.py is not the file you are looking for.
> >     >
> >     >     Please follow the instructions at
> >     >
> >     >
> >
> http://docs.astropy.org/en/stable/install.html#obtaining-the-source-packages
> >     >
> >     >     if you want to install from source, or better still just do
> `pip
> >     >     install specutils`.
> >     >
> >     >     Erik
> >     >
> >     >     > On Wed, Sep 17, 2014 at 11:18 AM, Erik Bray <
> embray at stsci.edu
> >     <mailto:embray at stsci.edu>
> >     >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>
> >     >     > <mailto:embray at stsci.edu <mailto:embray at stsci.edu>
> >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>>> wrote:
> >     >     >
> >     >     >     On 09/17/2014 11:15 AM, Aycha Tammour wrote:
> >     >     >     > Hi Erik,
> >     >     >     >
> >     >     >     > specutils.__version__
> >     >     >     > ''
> >     >     >     >
> >     >     >     > specutils.__file__
> >     >     >     > 'specutils/__init__.py'
> >     >     >     >
> >     >     >     > The package I am using is the one I grabbed from the
> >     github
> >     >     repo just yesterday.
> >     >     >
> >     >     >     It sounds like you're just trying to import the package
> >     >     directly out of the
> >     >     >     repository clone without building the package first or
> >     >     installing it.
> >     >     >
> >     >     >     It looks like specutils doesn't have installation
> >     instructions
> >     >     as such, but I
> >     >     >     recommend looking at the installation instructions for
> >     Astropy
> >     >     as it applies all
> >     >     >     the same:
> >     >     >
> >     >     >     http://docs.astropy.org/en/stable/install.html
> >     >     >
> >     >     >     Erik
> >     >     >
> >     >     >     > On Wed, Sep 17, 2014 at 11:10 AM, Erik Bray
> >     <embray at stsci.edu <mailto:embray at stsci.edu>
> >     >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>
> >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>
> >     >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>>
> >     >     >      > <mailto:embray at stsci.edu <mailto:embray at stsci.edu>
> >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>
> >     >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>
> >     <mailto:embray at stsci.edu <mailto:embray at stsci.edu>>>>> wrote:
> >     >     >      >
> >     >     >      >     On 09/17/2014 10:12 AM, Aycha Tammour wrote:
> >     >     >      >     > Hi,
> >     >     >      >     >
> >     >     >      >     > I have a question about one of Astropy's
> affiliated
> >     >     packages and I
> >     >     >     hope someone
> >     >     >      >     > here can help with it.
> >     >     >      >     > I am trying to use specutils' extinction module
> but
> >     >     it seems I am
> >     >     >     unable to
> >     >     >      >     > import it.
> >     >     >      >     >
> >     >     >      >     > I tried:
> >     >     >      >     > import specutils
> >     >     >      >     > specutils.extinction.extinction_ccm89(wave,
> >     r_v=3.1)
> >     >     >      >     > And got:
> >     >     >      >     > AttributeError: 'module' object has no attribute
> >     >     'extinction'
> >     >     >      >     >
> >     >     >      >     > When I tried:
> >     >     >      >     > from specutils import extinction
> >     >     >      >     > I still got
> >     >     >      >     > ImportError: cannot import name extinction
> >     >     >      >     >
> >     >     >      >     > Am I missing something here? I should mention
> >     that I
> >     >     was able to
> >     >     >     use some of the
> >     >     >      >     > functionality in spectrum1D.
> >     >     >      >
> >     >     >      >     When you import specutils what do
> >     >     >      >
> >     >     >      >       >>> specutils.__version__
> >     >     >      >
> >     >     >      >     and
> >     >     >      >
> >     >     >      >       >>> specutils.__file__
> >     >     >      >
> >     >     >      >     show?
> >     >     >      >
> >     >     >      >     _______________________________________________
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> >     <mailto:AstroPy at scipy.org <mailto:AstroPy at scipy.org>>
> >     >     >     <mailto:AstroPy at scipy.org <mailto:AstroPy at scipy.org>
> >     <mailto:AstroPy at scipy.org <mailto:AstroPy at scipy.org>>>>
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> >     >     >      >
> >     >     >      >
> >     >     >      >
> >     >     >      >
> >     >     >      >
> >     >     >      >
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> >     >
> >     >
> >     >
> >     > --
> >     > Aycha Tammour
> >     > Astronomy PhD Candidate
> >     > University of Western Ontario
> >     >
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-- 
Aycha Tammour
Astronomy PhD Candidate
University of Western Ontario
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