PyQt5 QColorDialog - Setting Color Dialog Options

# 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, 500, 400)

        # calling method
        self.UiComponents()

        # showing all the widgets
        self.show()


    # method for components
    def UiComponents(self):

        # creating a QColorDialog object
        dialog = QColorDialog(self)

        # setting option
        dialog.setOption(QColorDialog.ShowAlphaChannel)

        # executing the dialog
        dialog.exec_()


        # creating label to display the color
        label = QLabel("GfG", self)

        # setting geometry to the label
        label.setGeometry(100, 100, 200, 60)

        # making label multi line
        label.setWordWrap(True)

        # setting stylesheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 5px solid black;"
                            "}")

        color = Qt.green

        # setting graphic effect to the label
        graphic = QGraphicsColorizeEffect(self)

        # setting color to the graphic
        graphic.setColor(color)

        # setting graphic to the label
        label.setGraphicsEffect(graphic)



# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())