utils.py 文件源码

def __setitem__(self, key, value, *args, **kwargs):
            # Key was inserted before, remove it so we put it at front later
            if key in self:
                del self[key]

            # Too much items on the cache, remove the least recent used
            elif len(self) >= self._maxsize:
                self.popitem(False)

            # Insert the (key, value) pair on the front of the cache
            OrderedDict.__setitem__(self, key, value, *args, **kwargs)