How to use the reprounzip-qt.reprounzip_qt.gui.__init__.ReprounzipUi function in reprounzip-qt

def event(self, event):
        if event.type() == QtCore.QEvent.FileOpen:
            record_usage(fileopenevent=True)
            # Create new window for this RPZ
            window = ReprounzipUi(unpack=dict(package=event.file()))
            window.setVisible(True)
            self.windows.add(window)
            # Close first window if it exists
            if self.first_window and self.first_window.replaceable():
                self.first_window.close()
                self.first_window.deleteLater()
                self.first_window = None
            return True
        return QtWidgets.QApplication.event(self, event)

def __init__(self, unpack={}, run={}, tab=None, **kwargs):
        super(ReprounzipUi, self).__init__(**kwargs)

        self.tabs = QtWidgets.QTabWidget()
        self.tabs.addTab(UnpackTab(**unpack), "Open package")
        self.tabs.addTab(RunTab(**run), "Run unpacked experiment")
        self.tabs.widget(0).unpacked.connect(self._unpacked)
        if tab is not None:
            self.tabs.setCurrentIndex(tab)
        self.setCentralWidget(self.tabs)