How can I implement caching in Python?

How can I implement caching in Python?

You can use libraries like functools.lru_cache for simple caching or cachetools for more advanced options.

What is functools.lru_cache and how does it work?

functools.lru_cache is a decorator that caches the results of a function based on its input arguments, improving performance.

Can you show me a code example using lru_cache?

Sure! Here's a simple example:

from functools import lru_cache

@lru_cache(maxsize=32)
def fibonacci(n):
    if n < 2:
        return n
    return fibonacci(n-1) + fibonacci(n-2)

What are the limitations of using lru_cache?

The main limitation is the maximum size of the cache. Once it reaches that size, the least recently used items are discarded.