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1 pyfunction.py 这个实现一些通用的方法，为便于重用，单独放到一个py中

# my common functions here

"""
functions list:
    loadImage(name,colorkey)
    loadSound(name)   
"""

#imports
import os,pygame
from pygame.locals import *

def loadImage(name,colorkey=None):
    fullname = os.path.join('img',name)
    try:
        image = pygame.image.load(fullname)
    except pygame.error, message:
        print 'Cannot load image:', fullname
        raise SystemExit, message
    image = image.convert()
    if colorkey is not None:
        if colorkey is -1:
            colorkey = image.get_at((0,0))
        image.set_colorkey(colorkey,RLEACCEL)
    return image, image.get_rect()

def loadSound(name):
    class NoneSound:
        def play(self): pass
    if not pygame.mixer or not pygame.mixer.get_init():
        return NoneSound()
    fullname = os.path.join('snd',name)
    try:
        sound = pygame.mixer.Sound(fullname)
    except pygame.error, message:
        print 'Cannot load sound:', fullname
        raise SystemExit, message
    return sound