36. PyQt6 QPen

import sys
from PyQt6.QtWidgets import QApplication, QWidget
from PyQt6.QtGui import QGuiApplication, QPainter, QPen
from PyQt6.QtCore import Qt


class App(QWidget):

    def __init__(self):
        super().__init__()
        self.text = None
        self.setMinimumSize(50, 50)
        self.initUI()

    def initUI(self):
        self.setWindowTitle("PyQt6 QPen")

        self.setGeometry(100, 100, 400, 300)
        self.center()

    def paintEvent(self, event):
        qp = QPainter()
        qp.begin(self)
        self.drawLines(qp)
        qp.end()

    def drawLines(self, qp):
        pen = QPen(Qt.GlobalColor.black, 2, Qt.PenStyle.SolidLine)

        qp.setPen(pen)
        qp.drawLine(20, 80, 250, 80)

        pen.setStyle(Qt.PenStyle.DashLine)

        qp.setPen(pen)
        qp.drawLine(20, 80, 250, 80)

        pen.setStyle(Qt.PenStyle.DashDotLine)
        qp.setPen(pen)
        qp.drawLine(20, 120, 250, 120)

        pen.setStyle(Qt.PenStyle.DotLine)
        qp.setPen(pen)
        qp.drawLine(20, 160, 250, 160)

        pen.setStyle(Qt.PenStyle.DashDotDotLine)
        qp.setPen(pen)
        qp.drawLine(20, 200, 250, 200)

        pen.setStyle(Qt.PenStyle.CustomDashLine)
        qp.setPen(pen)
        qp.drawLine(20, 240, 250, 240)

    def center(self):
        qr = self.frameGeometry()
        cp = QGuiApplication.primaryScreen().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())


if __name__ == "__main__":
    app = QApplication(sys.argv)
    cls_app = App()
    cls_app.show()
    sys.exit(app.exec())