General
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This is a simple cache to store that persists even after a program has terminated.
The default location to store cached items is in a ".cache" folder in the current
directory. This can be set by setting the SIMPLECACHE_DIR attribute

Methods:
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cache(func [, *args ])
    Places an expensive function into a cache

clear_cache
    Clears the cache

cache_put(obj, key)
    Put in cache under key value

cache_get(key)
    Get a cache via a key


@memoized
def fib(n):
    ...