from PyQt6.QtWidgets import *

from PyQt6.QtGui import QFont

import sys

class PyQt603(QWidget):

    def __init__(self):

        super().__init__()

        self.initUI()

    def initUI(self):

        self.setWindowTitle('气轻PyQt6')                #​ 设置窗口标题

        self.resize(700, 300)                           # 设置窗口大小

        self.edit = QLineEdit(self)                     # 输入框

        self.edit.setGeometry(10, 0,240, 40)            # 设置位置和大小

        self.edit.setText('edit&#​39;)

        self.edit.setFont(QFont('Arial&#​39;,20))

        self.edit.setEchoMode(QLineEdit.EchoMode.Password)  # 密码

        self.show()

if __name__ == '__main__&#​39;:

    app = QApplication(sys.argv)

    window = PyQt603()

    sys.exit(app.exec())

执行结果