docs: def skip_http_error(statuses):
      '''
      A decorator to wrap with try..except to swallow
      specific HTTP errors.
  
      @skip_http_error((404, 503))
      def fetch():
          ...
      '''
  
      assert isinstance(statuses, tuple)
  
      def decorator(func):
          def wrapper(*args, **kwargs):
              try:
                  return func(*args, **kwargs)
              except HTTPError as e:
                  status_code = e.response.status_code
                  if status_code in statuses:
                      log.warn(str(e))
                  else:
                      raise
          return wrapper
      return decorator