def __init__(self):
        super(QtApplication, self).__init__()
        self._qapp = QApplication.instance() or QApplication([])
        self.resolver = ProxyResolver(factories=QT_FACTORIES)

    #--------------------------------------------------------------------------
    # Abstract API Implementation
    #--------------------------------------------------------------------------
``post`` is an optional configuration key.
dataset/ETHPy150Open nucleic/enaml/enaml/qt/qt_application.py/QtApplication.__init__--crossover with--dataset/ETHPy150Open ClusterHQ/powerstrip/powerstrip/test/test_config.py/ConfigurationValidationTests.test_optional_post