Raymond suggested a simple cache_info() method that returns a named tuple as a possible alternative.

I like that idea, as it makes displaying debugging information (the intended use case for these attributes) absolutely trivial:

>>> import functools
>>> @functools.lru_cache()
... def f(x):
...   return x
... 
>>> f.cache_info()
lru_cache_info(maxsize=100, currsize=0, hits=0, misses=0)

(Alternative patch attached)