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""" An implementation of a simple memory-backed cache. Right now this
doesn't provide many features, but more (time-based expiration, etc.)
can be added as necessary. """
class Cache(dict):
""" an implementation of a simple memory-backed cache """
def expire(self, key=None):
""" expire all items, or a specific item, from the cache """
if key is None:
self.clear()
elif key in self:
del self[key]
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