get the URL for the uploaded dmg, zip, or gzip from the latest release using api.github.com

github_latest_release.py

import json
import urllib2

def github_latest_release(user,repo):
	SUPPORTED_TYPES=['dmg','zip','gz']
	DEST=str(u'https://api.github.com/repos/%s/%s/releases' % (user,repo))
	data = json.load(urllib2.urlopen(DEST))
	try:
		latest_release = data[0]['assets'][0]['browser_download_url']
		for t in SUPPORTED_TYPES:
			if latest_release.lower().endswith(t):
				return latest_release
	except:
	  pass
    return None