[PyQt] How to write event function

[Squalo]

How can I correctly write the event function to pass from one QLineEdit to another by pressing the enter key? Post a working snippet. Thank you

from PyQt5 import QtCore, QtWidgets, QtGui

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(193, 119)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout_2.setObjectName("verticalLayout_2")

        self.x = QtWidgets.QLineEdit()
        self.verticalLayout_2.addWidget(self.x)
        self.x1 = QtWidgets.QLineEdit()
        self.verticalLayout_2.addWidget(self.x1)

        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "0"))

    def event(self, event):
        if event.type() == QEvent.KeyPress:
            if event.key() in (Qt.Key_Return, Qt.Key_Enter):
                self.focusNextPrevChild(True)
        return super().event(event)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())