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편집 파일: functools.cpython-38.pyc
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See: http://en.wikipedia.org/wiki/Cache_replacement_policies#Least_recently_used_(LRU) r r� Nz=Expected first argument to be an integer, a callable, or Nonec s t | � �t�}t|| �S r@ )�_lru_cache_wrapper� _CacheInfor )� user_functionr �r� r� r$ r% �decorating_function s z&lru_cache.<locals>.decorating_function)r� �intrd �boolr� r� r r] )r� r� r� r r� r$ r� r% r � s �c s� t � �t� d\��� �i �d � � d��j��j�t� � g ���d d g�d d �< � dkrh� �fdd�}nN� d kr���� � � ���fdd�}n*� �������� � � � � ���fdd�}��� � � � fdd �}��� � � �fd d �}||_||_|S ) N)r r� r� � r Fc s � d7 � �| |�}|S �Nr� r$ )ra r� r� )r� r� r$ r% r $ s z#_lru_cache_wrapper.<locals>.wrapperc sH �| |��}�|��}|�k r*�d7 �|S �d7 ��| |�}|� |< |S r� r$ )ra r� r� r� )�cache� cache_getr� �make_keyr� �sentinelr� r� r$ r% r - s c s> � | |��}� �z �|�}|d k r~|\}}}}||�< ||�< � � }| |�< � �< ||�< � |�< �d7 �|W 5 Q R � S � d7 � W 5 Q R X �| |�}� �� |�kr�n��r�� } || � < || �< | � � � � } � � } d � � < � �< �| = | �|< n6� � }|� ||g}| |�< � �< �|< �� � k�W 5 Q R X |S r� r$ ) ra r� r� �linkZ link_prevZ link_nextZ_keyr� ZlastZoldrootZoldkeyZ oldresult)�KEY�NEXT�PREV�RESULTr� r� � cache_len�fullr� �lockr� r� r� rK r� r� r$ r% r < sB c s, �� � ����� �W 5 Q R � S Q R X dS )zReport cache statisticsNr$ r$ )r� r� r� r� r� r� r$ r% � cache_infou s z&_lru_cache_wrapper.<locals>.cache_infoc s< ��. � � � ��ddg�dd�< d ��d�W 5 Q R X dS )z$Clear the cache and cache statisticsNr F)�clearr$ )r� r� r� r� r� rK r$ r% � cache_clearz s z'_lru_cache_wrapper.<locals>.cache_clear)rA r� r� �__len__r r� r� )r� r� r� r� r r� r� r$ )r� r� r� r� r� r� r� r� r� r� r� r� r� r� rK r� r� r� r% r� s* *9 r� )r� c C s� g }dd� | D �} | s|S | D ]2}|d }| D ] }||dd� kr.d} q q. qRq |dkrbt d��|�|� | D ]}|d |krp|d= qpqdS )z�Merges MROs in *sequences* to a single MRO using the C3 algorithm. Adapted from http://www.python.org/download/releases/2.3/mro/. c S s g | ] }|r|�qS r$ r$ �rB �sr$ r$ r% � <listcomp>� s z _c3_merge.<locals>.<listcomp>r r� NzInconsistent hierarchy)� RuntimeError�append)� sequencesr� �s1� candidate�s2�seqr$ r$ r% � _c3_merge� s" r� Nc s t t| j��D ]$\}�t�d�rt| j�| } q8qd}� rDt� �ng � t| jd|� �}g }t| j|d� �}� D ]0�t| ��rtt�fdd�| jD ��st|��� qt|D ]�� � �� q�� fdd�|D �}� fdd�|D �}� fd d�|D �} t | gg| | | |g |g |g �S ) a� Computes the method resolution order using extended C3 linearization. If no *abcs* are given, the algorithm works exactly like the built-in C3 linearization used for method resolution. If given, *abcs* is a list of abstract base classes that should be inserted into the resulting MRO. Unrelated ABCs are ignored and don't end up in the result. The algorithm inserts ABCs where their functionality is introduced, i.e. issubclass(cls, abc) returns True for the class itself but returns False for all its direct base classes. 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