python-cashed

Simple caching using decorators

Intallation

pip install cashed

Usage

The cached decorator requires the arguments of the wrapped function to be hashable. cached accepts arguments capacity and seconds to limit the size of the cache and limit age of cached items. cached functions similarly to functools.lru_cache with the addition of the optional time constraint.

import time
from cashed import cached

@cached(capacity=100, seconds=5)
def fib(n):
    if n == 0 or n == 1:
        return n
    return fib(n-1) + fib(n-2)

fib(100)          # -> 354224848179261915075L
fib.cache_info()  # -> {'seconds': 5, 'hits': 98, 'capacity': 100, 'misses': 101, 'size': 100}
time.sleep(5)
fib.cache_info()  # -> {'hits': 98, 'capacity': 100, 'seconds': 5, 'misses': 101, 'size': 0}