---

import sys
from PyQt5.QtWidgets import QWidget, QApplication

from PyQt5.QtGui import QPainter, QPen
from PyQt5.QtCore import Qt, QPoint, QPointF, QLineF










    def paintEvent(self, event):
        p1 = QPoint(0,79.4)
        p2 = QPoint(140,180)


        painter = QPainter(self)
        pen = QPen(Qt.GlobalColor.red, 3)
        painter.setPen(pen)
        painter.drawLine(p1, p2)