If you wanted to avoid the __getattr__ __setattr__ speed hit, something
like this would work. However, you have to not mind calling a function
to get the data, instead of only getting the attribute:
class Cache(object):
_cache = {}
def __init__(self, filename):
self.filename = filename
def Get(self):
obj = self._cache.get(self.filename, None)
if not obj:
obj = self._cache[self.filename] = Load(self.filename)
return obj
@staticmethod
def Clear():
print "\nClearing cache\n"
Cache._cache = {}
class Sprite(Cache):
def Draw(self):
print self.Get()
class Sound(Cache):
def Play(self):
print self.Get()
def Load(filename):
print "********** Open '%s' here" % filename
suffix = filename.lower()[-3:]
if suffix in ['png', 'bmp', 'jpg', 'tif']:
tag = 'Image'
elif suffix in ['wav', 'mp3']:
tag = 'Sound'
return "%s data from %s" % (tag, filename)
def main():
sprite1 = Sprite('data/pic_1.png')
sprite2 = Sprite('data/pic_2.png')
sound1 = Sound('data/sound_22.wav')
sprite1.Draw()
sprite2.Draw()
sound1.Play()
sprite1.Draw()
sprite2.Draw()
sound1.Play()
Cache.Clear()
sprite1.Draw()
sprite2.Draw()
sound1.Play()
sprite1.Draw()
sprite2.Draw()
sound1.Play()
main()
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