[AstroPy] question re specutils
Thomas Robitaille
thomas.robitaille at gmail.com
Thu Sep 18 16:15:49 EDT 2014
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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> >
> > --
> > Aycha Tammour
> > Astronomy PhD Candidate
> > University of Western Ontario
> >
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