I have a simple python script, that has some functions that run in a loop (I'm taking sensor readings).

while True:
    print "Doing a function"

If the keyboard is pressed I'd like to print "key pressed".

What's the simplest way of doing this in Python? I've searched high and low. I've found out how to do it with pygame, but I'd rather do it without. If I do have to use pygame is it possible to not have a separate window for the application?:

import pygame, time
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption('Pygame Keyboard Test')
pygame.mouse.set_visible(0)


while True:

   print "doing a function"

    for event in pygame.event.get():
      if (event.type == KEYUP) or (event.type == KEYDOWN):
         print "key pressed"
         time.sleep(0.1)