recipe-302997.py 文件源码

def __init__(self, max_size=0):
        """ Builds a cache with a limit of max_size entries.
            If this limit is exceeded, the Least Recently Used entry is discarded.
            if max_size==0, the cache is unbounded (no LRU rule is applied).
        """
        object.__init__(self)
        self._maxsize=max_size
        self._dict={}
        self._lock=Lock()

        # Header of the access list
        if self._maxsize:
            self._head=Entry(None)
            self._head._previous=self._head
            self._head._next=self._head