code: def raise_for_status(self, allow_redirects=True):
          
  
          if self.status_code == 304:
              return
          elif self.error:
              if self.traceback:
                  six.reraise(Exception, Exception(self.error), Traceback.from_string(self.traceback).as_traceback())
              http_error = HTTPError(self.error)
          elif (self.status_code >= 300) and (self.status_code < 400) and not allow_redirects:
              http_error = HTTPError('%s Redirection' % (self.status_code))
          elif (self.status_code >= 400) and (self.status_code < 500):
              http_error = HTTPError('%s Client Error' % (self.status_code))
          elif (self.status_code >= 500) and (self.status_code < 600):
              http_error = HTTPError('%s Server Error' % (self.status_code))
          else:
              return
  
          http_error.response = self
          raise http_error
docs: Raises stored :class:`HTTPError` or :class:`URLError`, if one occurred.