> I would probably write it something like this:
>
> def getCachedResult(cache, key):
> def _gotResult(item):
> try:
> if item.obsolete():
> return None
> d = item.read()
> d.addCallback(lambda data: renew(data))
> except:
> item.release()
> raise
> d.addBoth(lambda ign: item.release())
> return d
>
> def _ebNotFound(f):
> f.trap(NotFound)
> return None
>
> return cache.open(key).addCallbacks(_gotResult, _ebNotFound)
>
> Note: code is untested
>
My variant is like yours.
I ask this question because I am confusing with this ugly slice of code:
try:
...
except:
item.release()
raise
Only inlineCallbacks helps me...
Thanks.
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