如何在一个类(python/pygame)中添加一个带有if语句(按键移动)的函数？

import pygame

class Game:
    def __init__(self):
        pygame.init()
        self.screen = pygame.display.set_mode((800, 600))
        self.player_x = 400
        self.player_y = 300

    def move(self):
        for event in pygame.event.get():
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    self.player_x -= 10
                elif event.key == pygame.K_RIGHT:
                    self.player_x += 10
                elif event.key == pygame.K_UP:
                    self.player_y -= 10
                elif event.key == pygame.K_DOWN:
                    self.player_y += 10

    def run(self):
        running = True
        while running:
            self.move()
            self.screen.fill((255, 255, 255))
            pygame.draw.circle(self.screen, (0, 0, 255), (self.player_x, self.player_y), 20)
            pygame.display.flip()
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    running = False

game = Game()
game.run()