[AstroPy] Help needed - Pix2Sky error

[Christian Johnson]

Nadia,

Do you know of a simple way to install the master version? I tried
following the instructions here:
http://astropy.readthedocs.org/en/stable/install.html#building-from-source
to install the development version but I'm getting errors trying to install

Thanks,
Christian

On Thu, Sep 10, 2015 at 11:48 AM, Nadezhda Dencheva <dencheva at stsci.edu>
wrote:

> Christian,
>
> This is in master, I don't think it's been released yet.
>
> Nadia
> ------------------------------
> *From:* astropy-bounces at scipy.org [astropy-bounces at scipy.org] on behalf
> of Christian Johnson [arcjohns at ucsc.edu]
> *Sent:* Thursday, September 10, 2015 2:44 PM
> *To:* Astronomical Python mailing list
> *Subject:* Re: [AstroPy] Help needed - Pix2Sky error
>
> Nadia,
>
> Thanks for the reply! Unfortunately I get the same error with your syntax (AttributeError:
> 'module' object has no attribute 'Pix2Sky_AIT'). I believe my
> projections.py file is out of date- there's no AIT class defined in
> it, when it should look like this (
> https://github.com/astropy/astropy/blob/master/astropy/modeling/projections.py
> ). I'm using astropy version 1.04 which I believe is the current version,
> so I'm confused about why I don't have the updated code?
>
> Thanks,
> Christian
>
> On Thu, Sep 10, 2015 at 11:37 AM, Nadezhda Dencheva <dencheva at stsci.edu>
> wrote:
>
>> Hi Christian,
>>
>> It' s best to import models like this:
>>
>> >>> from astropy.modeling import  models
>> >>> ait = models.Pix2Sky_AIT()
>> >>> ait(1, 2)
>> (1.0004603647362484, 2.000082499873663)
>> >>> ait.inverse(1.0004603647362484, 2.000082499873663)
>> (1.0, 2.0000000000000004)
>>
>> Nadia
>>
>> ------------------------------
>> *From:* astropy-bounces at scipy.org [astropy-bounces at scipy.org] on behalf
>> of Christian Johnson [arcjohns at ucsc.edu]
>> *Sent:* Thursday, September 10, 2015 2:05 PM
>> *To:* astropy at scipy.org
>> *Subject:* [AstroPy] Help needed - Pix2Sky error
>>
>> Hi all,
>>
>> (if this is the wrong list to use for questions like this, please let me
>> know!)
>>
>> I'm attempting to use astropy to get data out of a FITS file in the
>> Aitoff projection, and was trying to use the
>> astropy.modeling.projections.Pix2Sky_AIT class (that I found here:
>> http://astropy.readthedocs.org/en/latest/modeling/index.html). However,
>> when I try to use it, I get an error that there is no module of that name ("AttributeError:
>> 'module' object has no attribute 'Pix2Sky_AIT'"). I can successfully import
>> astropy.modeling.projections.Projection or astropy.modeling.projections.Zenithal
>> or a few others, but most throw this error.
>>
>> Is there something I'm doing wrong, or does some other package need to be
>> installed for these modules to work correctly?
>>
>> Thanks in advance,
>> Christian Johnson
>>
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>>
>>
>
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