import pygame
from pygame.locals import*
import sys

pygame.init ()
display = pygame.display.set_mode((300,300))

while 1:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_a:
                print("Key A has been pressed")
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_a:
                print("key A has been released")