import pygame
from pygame.locals import *
from sys import exit

pygame.init()
screen = pygame.display.set_mode((640, 480), 0, 32)

font = pygame.font.SysFont("arial", 32);
font_height = font.get_linesize()

while True:
    
    for event in pygame.event.get():
        if event.type == QUIT:
            exit()
        
    screen.fill((255, 255, 255))
    
    pressed_key_text = []    
    pressed_keys = pygame.key.get_pressed()
    y = font_height
        
    for key_constant, pressed in enumerate(pressed_keys):
        if pressed:
            key_name = pygame.key.name(key_constant)
            text_surface = font.render(key_name+" pressed (%i)"%key_constant, True, (0,0,0))
            screen.blit(text_surface, (8, y) )
            y+= font_height

    pygame.display.update()