用Pyside绘制填充椭圆

import sys
from PySide2.QtWidgets import QApplication, QWidget
from PySide2.QtGui import QPainter, QColor, QBrush
from PySide2.QtCore import Qt

class MyWidget(QWidget):
    def __init__(self):
        super().__init__()

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)  # 抗锯齿
        painter.setBrush(QBrush(Qt.red))  # 设置填充颜色为红色
        painter.drawEllipse(50, 50, 200, 100)  # 绘制椭圆，参数分别为左上角坐标和宽高

if __name__ == '__main__':
    app = QApplication(sys.argv)
    widget = MyWidget()
    widget.show()
    sys.exit(app.exec_())