mitsuhiko/werkzeug — Issue #150: Cache add method does not return whether the value was set
Author: anti-social
Created: 2012-01-03 12:00:50+00:00
State: open

I need that for lock based on cache:
aquire_lock = lambda lock_id: cache.add(lock_id, 'true', LOCK_EXPIRE)

But with cache from werkzeug I cannot know whether lock was aquired.