我们可以在QLabel中创建一个图形吗？如果没有，在对话框中创建图形的最佳方式是什么？

from PyQt5.QtWidgets import QDialog, QGraphicsScene, QGraphicsView, QVBoxLayout, QApplication
from PyQt5.QtGui import QPainter, QColor, QPen
from PyQt5.QtCore import Qt

class MyDialog(QDialog):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Dialog with Graphics")
        
        # 创建场景和视图
        self.scene = QGraphicsScene()
        self.view = QGraphicsView(self.scene)
        
        # 创建图形项
        rect_item = self.scene.addRect(0, 0, 100, 100)
        ellipse_item = self.scene.addEllipse(50, 50, 100, 100)
        
        # 设置图形项的样式
        rect_item.setBrush(Qt.red)
        ellipse_item.setBrush(Qt.blue)
        
        # 将视图添加到对话框中
        layout = QVBoxLayout()
        layout.addWidget(self.view)
        self.setLayout(layout)

if __name__ == "__main__":
    app = QApplication([])
    dialog = MyDialog()
    dialog.show()
    app.exec_()