PyQt5 - draw text on window

The effect is as follows:

The code is as follows:

'''Drawing API: Drawing Text1. Text2. Various graphics (line, point, ellipse, arc, sector, polygon, etc.)3. ImageQPainterpainter = QPainter()painter.begin()painter.drawText(...)painter.end()Various elements must be drawn in the paintEvent event method'''import sysfrom PyQt5.QtWidgets import QApplication,QWidgetfrom PyQt5.QtGui import QPainter,QColor,QFontfrom PyQt5.QtCore import Qtclass DrawText(QWidget):def __init__(self):super(DrawText, self).__init__()self.setWindowTitle('Draw text on the window')self.resize(300,200)self.text = "Python from rookie to expert"def paintEvent(self, event):painter = QPainter(self)painter.begin(self)painter.setPen(QColor(150,43,5))painter.setFont(QFont('SimSun',25))painter.drawText(event.rect(), Qt.AlignCenter, self.text)painter.end()if __name__ == '__main__':app = QApplication(sys.argv)main = DrawText()main.show()sys.exit(app.exec_())