import sys

 from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayout,QLabel

 from PyQt5.QtGui import QColor

 from PyQt5.QtCore import pyqtProperty,Qt

 class Demo(QWidget):

     def __init__(self):

         super(Demo, self).__init__()

         self.c=QColor(Qt.red)

     @pyqtProperty(QColor)   #获取属性,注意要传入属性的类型

     def color(self):

         return self.c

     @color.setter          #设置属性

     def color(self,value):

         self.c=value

 if __name__ == '__main__':

     app = QApplication(sys.argv)

     demo = Demo()

     print(demo.color)

     demo.color=QColor(90,90,90)

     print(demo.color)

     demo.show()

     sys.exit(app.exec_())

 import sys

 from PyQt5.QtWidgets import QApplication, QWidget

 from PyQt5.QtGui import QColor

 from PyQt5.QtCore import pyqtProperty,Qt

 class Demo(QWidget):

     def __init__(self):

         super(Demo, self).__init__()

         self.c=QColor(Qt.red)

     def get_color(self):

         return self.c

     def set_color(self, value):

         self.c = value

     color = pyqtProperty(QColor, fget=get_color, fset=set_color) #添加属性

     #第一个参数要填属性的数据类型

 if __name__ == '__main__':

     app = QApplication(sys.argv)

     demo = Demo()

     print(demo.color)

     demo.color=QColor(90,90,90)

     print(demo.color)

     demo.show()

     sys.exit(app.exec_())