code: def post_comment(self, message):
          
          report_url = (
              'https://api.github.com/repos/%s/issues/%s/comments'
              % (self.repo_name, self.pr_number)
          )
          result = self.requester.post(report_url, {'body': message})
          if result.status_code >= 400:
              log.error("Error posting comment to github. %s", result.json())
          return result
docs: Comments on an issue, not on a particular line.