astropy/astropy — pull request #1048 by keflavich (2013-05-03 18:17:33+00:00)
Title: Added a new power-law ParametricModel

Of course, not all models should be built-in, but I think a power-law is a simple and common enough one that it ought to be included.

I wrote this PR in part to get some practice working with `model`s; any feedback on style would be helpful.