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import sysfrom PyQt5.QtWidgets import *from PyQt5.QtCore import *from PyQt5.QtGui import *#文本#各种图形#图像#在paintEvent事件方法中绘制各种元素class DrawTextDemo(QWidget):    def __init__(self):        super(DrawTextDemo,self).__init__()        self.setWindowTitle('在窗口上绘制文本')        self.resize(300,200)        self.text = 'Python-_-'    def paintEvent(self,event):        painter =QPainter(self)        painter.begin(self)        #绘制        painter.setPen(QColor(150,50,30))        painter.setFont(QFont('SimSun',26))        #区域        painter.drawText(event.rect(),Qt.AlignCenter,self.text)        painter.end()if __name__ == '__main__':    app =QApplication(sys.argv)    main = DrawTextDemo()    main.show()    sys.exit(app.exec_())

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