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�n)r� r r rB } s z _compose_mro.<locals>.<listcomp>c s4 x- � D]% } | | k r | | j k r d Sq Wd S)NTF)r� )r� r, )�typesr r �is_strict_base� s z$_compose_mro.<locals>.is_strict_basec s" g | ] } � | � s | � q Sr r )r? r� )r� r r rB � s c s" g | ] } | � k r | � q Sr r )r? r� )�type_setr r rB � s r� �reverseTr� )�setr� �__subclasses__r� r� �sortr� r� )rA r� �mror� �found�sub�subclsr )r� rA r� r� r� r� r � _compose_mroq s* ' r� c C s� t | | j � � } d } x | D]w } | d k r� | | k r� | | j k r� | | j k r� t | | � r� t d j | | � � � P| | k r" | } q" W| j | � S)Nz Ambiguous dispatch: {} or {})r� �keysr� r� r� rZ rq )rA �registryr� �match�tr r r � _find_impl� s r� c s� i � t � � d � � � � f d d � � d � � � � f d d � � � f d d � } | � t <� | _ � | _ t � � | _ � j | _ t | | � | S)Nc s� � d k r1 t � } � | k r1 � j � | � y � | } WnN t k r� y � | } Wn! t k r� t | � � } Yn X| � | <Yn X| S)N)r r� �KeyErrorr� )rA � current_token�impl)� cache_token�dispatch_cacher� r r �dispatch� s z singledispatch.<locals>.dispatchc s[ | d k r � � f d d � S| � � <� d k rM t � d � rM t � � � j � | S)Nc s � � | � S)Nr )�f)rA �registerr r �<lambda>� s z2singledispatch.<locals>.register.<locals>.<lambda>r� )rV r r� )rA rQ )r� r� r� r� )rA r r� � s z singledispatch.<locals>.registerc s � | d j � | | � S)Nr )rd )rS �kw)r� r r r% � s z singledispatch.<locals>.wrapper) r r> r� r� r r� r� � _clear_cacher )rQ r% r )r� r� r� r� r� r r � s )r r r r r )r )7�__all__� _functoolsr � ImportError�abcr � collectionsr r� r �weakrefr �_threadr r r r r r- r/ r0 r1 r3 r4 r5 r7 r8 r9 r; r< r= rC r r r r> r r� r� rz r� �str� frozensetr~ r� rg r� r� r r� r� r� r� r� r r r r r �<module> s� N % s - )
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