local cache

cache.py

Stamped = namedtuple('Stamped', 'stamp obj')

cache = {}


def cached(ttl, func, *args, **kw):
    'Simple inline cache for function calls'
    key = (func.__name__,) + args

    entry = cache.get(key, None)
    now = time.time()

    if not entry or (now - entry.stamp) > ttl:
        result = func(*args, **kw)
        entry = cache.setdefault(key, Stamped(now, result))
    return entry.obj