lru_cache.py 文件源码

def __init__(self, maxSize=100, resizeTo=70):
        '''
        ============== =========================================================
        **Arguments:**
        maxSize        (int) This is the maximum size of the cache. When some 
                       item is added and the cache would become bigger than 
                       this, it's resized to the value passed on resizeTo.
        resizeTo       (int) When a resize operation happens, this is the size 
                       of the final cache.
        ============== =========================================================
        '''
        assert resizeTo < maxSize
        self.maxSize = maxSize
        self.resizeTo = resizeTo
        self._counter = 0
        self._dict = {}
        if _IS_PY3:
            self._nextTime = itertools.count(0).__next__
        else:
            self._nextTime = itertools.count(0).next