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e- 4 d dl mZ d Z G d de ZdS ) )WeakSetc t j S )zReturns the current ABC cache token.
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Z xZ S ) r ah Metaclass for defining Abstract Base Classes (ABCs).
Use this metaclass to create an ABC. An ABC can be subclassed
directly, and then acts as a mix-in class. You can also register
unrelated concrete classes (even built-in classes) and unrelated
ABCs as 'virtual subclasses' -- these and their descendants will
be considered subclasses of the registering ABC by the built-in
issubclass() function, but the registering ABC won't show up in
their MRO (Method Resolution Order) nor will method
implementations defined by the registering ABC be callable (not
even via super()).
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c_ |S )zsRegister a virtual subclass of an ABC.
Returns the subclass, to allow usage as a class decorator.
zCan only register classesz'Refusing to create an inheritance cycle )
isinstancetype TypeError
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7 T** eW-- ' JJE****6666 7 7r c 8 | j dS )z.Clear the registry (for debugging or testing).N)r clearr# s r _abc_registry_clearzABCMeta._abc_registry_clearS s !!!!!r c j | j | j dS )z,Clear the caches (for debugging or testing).N)r r; r r< s r _abc_caches_clearzABCMeta._abc_caches_clearW s1 %%'''''r c |j }| j v rdS t | }||u r5 j t j k r | j v rdS | S t fd||fD S )z'Override for isinstance(instance, cls).TFc 3 B K | ]} | V d S N)__subclasscheck__)r cr# s r <genexpr>z,ABCMeta.__instancecheck__.<locals>.<genexpr>j s1 II3((++IIIIIIr ) r& r r* r r r r rC any)r# instancer. subtypes ` r __instancecheck__zABCMeta.__instancecheck__\ s % s~ % %4x.. h /12 2C 333 u((22 2IIIIh5HIIIIIIr c R t |t st d || j v rdS | j t
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