It is based off of the well-known "Conference Code of Conduct" which many groups have adopted over the past year or so. We have modified it slightly since we are a group, not a conference: http://confcodeofconduct.com/
https://www.girldevelopit.com/code-of-conduct http://www.codemash.org/codemash-code-conduct/ http://www.meetup.com/pdxpython/pages/Code_of_Conduct/