Importing required packages

import pygame as pg
import OpenGL.GL as opg

pygame 2.1.2 (SDL 2.0.16, Python 3.8.10)
Hello from the pygame community. https://www.pygame.org/contribute.html

Definition of App class

class App:
    def __init__(self, title):
        
        # initialize pygame engine
        pg.init()
        pg.display.set_mode((500,600), pg.OPENGL|pg.DOUBLEBUF)
        pg.display.set_caption(title)
        self.clock = pg.time.Clock()
        
        # initialize opengl
        opg.glClearColor(0.17,0.24,0.39,1) # RGBA Color Mode
        self.minLoop()
        
    def minLoop(self):
        opg.running = True
        
        # event loop
        while(opg.running):
            
            # checking events
            for evt in pg.event.get():
                if(evt.type == pg.QUIT):
                    opg.running = False
            
            # refreshing screen
            opg.glClear(opg.GL_COLOR_BUFFER_BIT)
            pg.display.flip()
            
            # timing
            self.clock.tick(60)
            
        self.quit()
    
    # for deallocation of memory and resources
    def quit(self):
        pg.quit()
        print("App Closed")

Driver Code

if __name__=="__main__":
    myApp = App('App window')

App Closed

Output

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