Class UnknownBackend

IPython/terminal/pt_inputhooks/__init__.py:34–41

class UnknownBackend(KeyError):
    def __init__(self, name):
        self.name = name

    def __str__(self):
        return ("No event loop integration for {!r}. "
                "Supported event loops are: {}").format(self.name,
                                    ', '.join(backends + sorted(registered)))


def set_qt_api(gui):