PyQt5 QLabel: comprobar si el efecto de desenfoque es de tipo widget

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
class Window(QMainWindow):
  
    def __init__(self):
        super().__init__()
  
        # setting title
        self.setWindowTitle("Python ")
  
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for widgets
    def UiComponents(self):
  
        # creating label
        label = QLabel("Label", self)
  
        # setting geometry to the label
        label.setGeometry(200, 100, 150, 60)
  
        # setting alignment to the label
        label.setAlignment(Qt.AlignCenter)
  
        # setting font
        label.setFont(QFont('Arial', 15))
  
        # setting style sheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 2px solid green;"
                            "background : lightgreen;"
                            "}")
  
        # creating a blur effect
        self.blur_effect = QGraphicsBlurEffect()
  
        # setting blur radius
        self.blur_effect.setBlurRadius(15)
  
        # adding blur effect to the label
        label.setGraphicsEffect(self.blur_effect)
  
        # creating a result label
        result = QLabel(self)
  
        # setting geometry to the result
        result.setGeometry(200, 200, 300, 30)
  
        # checking if blur effect is widget type
        check = self.blur_effect.isWidgetType()
  
        # setting text to the result
        result.setText("Widget type ? : " + str(check))
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())