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@ -479,7 +479,10 @@ class CacheListDescriptor(object):
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class _CacheContext(namedtuple("_CacheContext", ("cache", "key"))):
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# We rely on _CacheContext implementing __eq__ and __hash__ sensibly,
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# which namedtuple does for us.
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# which namedtuple does for us (i.e. two _CacheContext are the same if
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# their caches and keys match). This is important in particular to
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# dedupe when we add callbacks to lru cache nodes, otherwise the number
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# of callbacks would grow.
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def invalidate(self):
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self.cache.invalidate(self.key)
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