A starter template for pygame in python

pygame_main.py

import pygame
from pygame import Vector2

pygame.init()


class Game:
    def __init__(self):
        self.window_size = Vector2(512)
        self.window = pygame.display.set_mode(self.window_size)
        pygame.display.set_caption('playground')
        self.screen_scale = 3

        self.bg_clear = pygame.Surface(self.window_size)
        self.bg_clear.fill((60, 50, 60))

        self.clock = pygame.time.Clock()
        self.running = False

    @property
    def screen_size(self):
        return Vector2(self.window_size/self.screen_scale)

    def run(self):
        self.running = True
        while self.running:
            self.process_events()
            self.update()
            self.draw()

    def process_events(self):
        for event in pygame.event.get():
            if (event.type == pygame.QUIT or
                    (event.type == pygame.KEYDOWN and
                        event.key == pygame.K_ESCAPE)):
                self.running = False

            # react to events here

    def update(self):
        pygame.display.set_caption(
            f'playground - {int(self.clock.get_fps())}fps')
        dt = self.clock.tick(120)*.001

        # do updates here

    def draw(self):
        self.window.blit(self.bg_clear, Vector2())
        screen = pygame.Surface(self.screen_size, pygame.SRCALPHA)

        # draw/blit to `screen` here

        self.window.blit(pygame.transform.scale(
            screen, self.window_size), Vector2())
        pygame.display.flip()


if __name__ == '__main__':
    Game().run()