##
18.6.21 HTTPErrorProcessor Objects

New in version 2.4.

`unknown_open`( | )

  Process HTTP error responses.

  For 200 error codes, the response object is returned immediately.

  For non-200 error codes, this simply passes the job on to the `protocol_error_code()` handler methods, via `OpenerDirector.error()`. Eventually, `urllib2.HTTPDefaultErrorHandler` will raise an `HTTPError` if no other handler handles the error.