def __init__(self, proxy, parent=None, flags=Qt.Widget):
        super(QWindow, self).__init__(parent, Qt.Window | flags)
        self._proxy_ref = atomref(proxy)
.. todo::
dataset/ETHPy150Open nucleic/enaml/enaml/qt/qt_window.py/QWindow.__init__--crossover with--dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/datasets/preprocessing.py/PCA.apply