

def get_backend(backend='qt'):
    global _backend
    if (_backend is not None):
        return _backend
    if (backend != 'qt'):
        raise ValueError('Only QT Backend supported')
    from glue.qt import qt_backend
    _backend = qt_backend
    return _backend

dataset/ETHPy150Open glue-viz/glue/glue/backends.py get_backend/original