o [ i@s,ddlZGdddeZGdddeZdS)Nc,eZdZdZfddZfddZZS) Singletonz Singleton metaclass Based on Python Cookbook 3rd Edition Recipe 9.13 Only one instance of a class can exist. Does not work with __slots__ cstj|i|d|_dSN)super__init___Singleton__instanceselfargskw __class__Q/home/air/sos/back/venv/lib/python3.10/site-packages/openpyxl/compat/singleton.pyr s zSingleton.__init__cs$|jdurtj|i||_|jSr)rr__call__rr rrrs zSingleton.__call____name__ __module__ __qualname____doc__rr __classcell__rrr rr rcr)Cachedz Caching metaclass Child classes will only create new instances of themselves if one doesn't already exist. Does not work with __slots__ cs tj|i|t|_dSr)rrweakrefWeakValueDictionary_Cached__cacherr rrrszCached.__init__cs.||jvr |j|Stj|}||j|<|Sr)rrr)r r objr rrr"s    zCached.__call__rrrr rrrr)rtyperrrrrrs