Assuming you don't want to modify the code (e.g., because you want to be able to just port to 3.3 and use the stdlib functools.lru_cache
, or use functools32
out of PyPI instead of copying and pasting a recipe into your code), there's one obvious solution: Create a new decorated instance method with each instance.
class Test:
def cached_method(self, x):
return x + 5
def __init__(self):
self.cached_method = lru_cache(maxsize=16)(self.cached_method)