qgraphicsscene画随机点

好的，以下是使用QGraphicsScene绘制随机点的示例代码：

import random
from PyQt5.QtWidgets import QGraphicsScene, QGraphicsView
from PyQt5.QtCore import Qt, QPointF
from PyQt5.QtGui import QPen, QColor

class MyScene(QGraphicsScene):
    def __init__(self, parent=None):
        super(MyScene, self).__init__(parent)
        self.setSceneRect(-200, -200, 400, 400)
        self.drawPoints()

    def drawPoints(self):
        pen = QPen(QColor(255, 0, 0), 3, Qt.SolidLine)
        for i in range(50):
            x = random.randint(-200, 200)
            y = random.randint(-200, 200)
            point = QPointF(x, y)
            self.addEllipse(point.x(), point.y(), 5, 5, pen)

if __name__ == '__main__':
    import sys
    from PyQt5.QtWidgets import QApplication

    app = QApplication(sys.argv)
    view = QGraphicsView()
    scene = MyScene()
    view.setScene(scene)
    view.show()
    sys.exit(app.exec_())

这个示例代码会在QGraphicsScene中绘制50个随机点，每个点的坐标在(-200, -200)到(200, 200)的范围内随机生成。你可以根据自己的需要进行修改。