Cache In Memory

RC doesn’t support other backends, because mostly you want to use a cache server. But if you really need to put some cache in memory, it should be easy:

from functools import wraps

def cache(func):
    saved = {}
    @wraps(func)
    def newfunc(*args):
        if args in saved:
            return saved[args]
        result = func(*args)
        saved[args] = result
        return result
    return newfunc

@cache
def lookup(url):
    return url