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How to use decorator as Cache
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| import functools | |
| def memoize(obj): | |
| cache = {} | |
| @functools.wraps(obj) | |
| def memoizer(*args, **kwargs): | |
| if args not in cache: | |
| cache[args] = obj(*args, **kwargs) | |
| return cache[args] | |
| return memoizer | |
| @memoize | |
| def fib(n): | |
| if n < 2: | |
| return n | |
| else: | |
| return fib(n - 1) + fib(n - 2) |
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