This document and APE grew out of discussion at the April 2015 Lorentz Center meeting on Python in Astronomy, prompted both by meetings involving a substantial group from this community, as well as the addition of commenting capabilities to the Astropy Tutorials page. We believe that our community has developed to the point that we should have a code of conduct specific to the Astropy project (and other projects of similar mind). This APE provides the text of just such a code of conduct, which will be adopted by the project to provide guidance to the community. The code of conduct will be licensed using the Creative Commons Attribution license, allowing other projects to use this code or adapt it to their needs.