[AstroPy] Importing packages across distributions?

[Nathan Goldbaum]

Hi Eric,

I think you need to recursively add all the subfolders in the anaconda
folder to your sys.path.  You can also manage all this from the command
line by setting the PYTHONPATH.

I'm not familiar with CASA, but presumably it should be possible to install
it in a way that uses anaconda's python instead of relying on its own, that
way you won't need to worry about this PYTHONPATH mess.  Instructions on
how to build CASA from source are available here:
https://safe.nrao.edu/wiki/bin/view/Main/ScottRankinCasaBuildNotes

Cheers,

Nathan


On Mon, May 6, 2013 at 2:22 PM, Eric L. N. Jensen
<ejensen1 at swarthmore.edu>wrote:

> Hi all,
>
> First, thanks for your answers to my previous question about an
> easy-to-install python distribution - I ended up installing anaconda.
>
> My next question is most likely a pretty elementary bit of python, but I
> haven't succeeded in finding a discussion of it: to what extent are
> packages installed under one distribution's tree importable by another
> distribution?  I had thought/hoped that after installing anaconda (with its
> rich collection of auxiliary packages) that I might be able to do the
> following within CASA (with has its own python installation):
>
>    sys.path.append('/Users/ejensen1/anaconda')
>
>    from astropy import coordinates as coord
>
> but that fails with "No module named astropy".    The situation is similar
> if I can start up the Mac OS system-distributed python, so it's not just a
> CASA thing.
>
> So my specific question is whether this sort of thing is ever possible
> (simply importing a module from somewhere else in a directory tree), and
> more generally where to find some documentation / discussion of this issue
> - all the discussions I've found so far (probably not searching on the
> right words) imply that importing modules is simply a matter of setting the
> path correctly, but it's clearly more complicated than that.
>
> Thanks,
>
> Eric
>
>
>
>
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