如何在pyqt中实现QLineEdit与QLineEdit的无缝连接

from PyQt5.QtWidgets import QApplication, QWidget, QLineEdit
from PyQt5.QtCore import Qt

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

    def initUI(self):
        self.setGeometry(100, 100, 300, 200)
        self.setWindowTitle('QLineEdit连接示例')

        self.line_edit1 = QLineEdit(self)
        self.line_edit1.move(20, 20)
        self.line_edit1.textChanged.connect(self.on_text_changed)

        self.line_edit2 = QLineEdit(self)
        self.line_edit2.move(20, 60)
        self.line_edit2.setReadOnly(True)

    def on_text_changed(self, text):
        self.line_edit2.setText(text)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MyWindow()
    window.show()
    sys.exit(app.exec_())