---

from PyQt6.QtWidgets import QApplication, QWidget, QLineEdit
from PyQt6.QtGui import QIcon, QFont
import sys



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

        self.setGeometry(200,200, 700, 400)
        self.setWindowTitle("PyQt6 QLineEdit")
        self.setWindowIcon(QIcon('images/python.png'))

        self.line_edit = QLineEdit(self)
        self.line_edit.setFont(QFont("Sanserif", 15))
        #line_edit.setText("Default Text")
        #line_edit.setPlaceholderText("Please enter your username")
        #line_edit.setEnabled(False)
        self.line_edit.setEchoMode(QLineEdit.EchoMode.Password)
        self.line_edit.textChanged.connect(self.func)

    def func(self):
        title = self.line_edit.text()
        self.setWindowTitle(title)


app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec())