code: def update_settings(self, service_id, version_number, settings={}):
  		
  		body = urllib.urlencode(settings)
  		content = self._fetch("/service/%s/version/%d/settings" % (service_id, version_number), method="PUT", body=body)
  		return FastlySettings(self, content)
docs: Update the settings for a particular service and version.