在哪里添加python KEYUP和KEYDOWN

Question

我正在尝试将pygame KEYUP和KEYDOWN函数添加到我的pygame控件中。我插入它时遇到问题，我会很乐意帮助解决这个简单的问题。我有我的主游戏循环，然后是一个程序范围的if else语句，（如果gun_select == True），这将创建我的起始屏幕。非常感谢！

# Loop as long as done == False
while not done:

    for event in pygame.event.get():  # User did something
        if event.type == pygame.QUIT:  # If user clicked close
            done = True  # Flag that we are done so we exit this loop


    # Clear the screen and set the screen background
    screen.fill(GREEN)

    if gun_select == True:
        #Controls
        if j == True:    
            keys = pygame.key.get_pressed()

        #log
        last_x1 = x1
        last_x2 = x2
        last_y1 = y1
        last_y2 = y2


        if keys[pygame.K_LEFT]:
            p1option -=1
            print p1option
        if keys[pygame.K_RIGHT]:
            p1option += 1
            print p1option
        if keys[pygame.K_a]:
            p2option -=1
        if keys[pygame.K_d]:
            p2option +=1
        if keys[pygame.K_r]:
            print "begin"
            gun_select = False