如何在QLineEdit小部件中使用双击信号？

from PyQt5.QtWidgets import QApplication, QLineEdit, QWidget, QVBoxLayout

class MyLineEdit(QLineEdit):
    def __init__(self):
        super().__init__()

    def mouseDoubleClickEvent(self, event):
        print("Double click on QLineEdit")
        super().mouseDoubleClickEvent(event)

class MyWindow(QWidget):
    def __init__(self):
        super().__init__()

        self.line_edit = MyLineEdit()

        container = QVBoxLayout()
        container.addWidget(self.line_edit)

        self.setLayout(container)

app = QApplication([])

window = MyWindow()
window.show()

app.exec_()