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# from http://code.activestate.com/recipes/578231-probably-the-fastest-memoization-decorator-in-the-/
__all__ = ["memoize"]
def memoize(f):
""" Memoization decorator for a function taking one or more arguments. """
class memodict(dict):
def __getitem__(self, *key, **kwkey):
return dict.__getitem__(self, (tuple(key), tuple((k, kwkey[k]) for k in sorted(kwkey.keys()))))
def __missing__(self, key):
args, kwargs = key
self[key] = ret = f(*args, **dict(kwargs))
return ret
return memodict().__getitem__
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