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Pf                 @   s4   d Z ddlmZ G dd deZG dd deZdS )zb
The cache object API for implementing caches. The default is a thread
safe in-memory dictionary.
    )Lockc               @   s,   e Zd Zdd Zdd Zdd Zdd Zd	S )
	BaseCachec             C   s
   t  d S )N)NotImplemented)selfkey r   /usr/lib/python3.6/cache.pyget
   s    zBaseCache.getc             C   s
   t  d S )N)r   )r   r   valuer   r   r   set   s    zBaseCache.setc             C   s
   t  d S )N)r   )r   r   r   r   r   delete   s    zBaseCache.deletec             C   s   d S )Nr   )r   r   r   r   close   s    zBaseCache.closeN)__name__
__module____qualname__r	   r   r   r   r   r   r   r   r      s   r   c               @   s.   e Zd Zd
ddZdd Zdd Zdd	 ZdS )	DictCacheNc             C   s   t  | _|pi | _d S )N)r   lockdata)r   Z	init_dictr   r   r   __init__   s    zDictCache.__init__c             C   s   | j j|d S )N)r   r	   )r   r   r   r   r   r	      s    zDictCache.getc          
   C   s&   | j  | jj||i W d Q R X d S )N)r   r   update)r   r   r
   r   r   r   r       s    zDictCache.setc          	   C   s,   | j  || jkr| jj| W d Q R X d S )N)r   r   pop)r   r   r   r   r   r   $   s    
zDictCache.delete)N)r   r   r   r   r	   r   r   r   r   r   r   r      s   
r   N)__doc__Z	threadingr   objectr   r   r   r   r   r   <module>   s   