import pygame
from pygame .locals import *
import sys

pygame.init()
display = pygame.display.set_mode((300,300))
FPS_CLOCK = pygame.time.Clock()

while 1:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()

    mouse_presses = pygame.mouse.get_pressed()

    if mouse_presses[0]:
        print("Left Mouse Key is being pressed")

    pygame.display.update()
    FPS_CLOCK.tick(30)