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abc.cpython-38.pyc
U e5d� � @ s� d Z dd� ZG dd� de�ZG dd� de�ZG dd� de�Zz,d d lm Z m Z m Z m Z m Z mZmZmZ W n* ek r� d d lmZm Z d e_Y nX G d d� de�ZG dd� ded�ZdS )z3Abstract Base Classes (ABCs) according to PEP 3119.c C s d| _ | S )a< A decorator indicating abstract methods. Requires that the metaclass is ABCMeta or derived from it. A class that has a metaclass derived from ABCMeta cannot be instantiated unless all of its abstract methods are overridden. The abstract methods can be called using any of the normal 'super' call mechanisms. abstractmethod() may be used to declare abstract methods for properties and descriptors. Usage: class C(metaclass=ABCMeta): @abstractmethod def my_abstract_method(self, ...): ... T)�__isabstractmethod__)�funcobj� r �/usr/lib64/python3.8/abc.py�abstractmethod s r c s$ e Zd ZdZdZ� fdd�Z� ZS )�abstractclassmethodztA decorator indicating abstract classmethods. Deprecated, use 'classmethod' with 'abstractmethod' instead. Tc s d|_ t� �|� d S �NT�r �super�__init__��self�callable�� __class__r r r $ s z abstractclassmethod.__init__��__name__� __module__� __qualname__�__doc__r r � __classcell__r r r r r s r c s$ e Zd ZdZdZ� fdd�Z� ZS )�abstractstaticmethodzvA decorator indicating abstract staticmethods. Deprecated, use 'staticmethod' with 'abstractmethod' instead. Tc s d|_ t� �|� d S r r r r r r r 1 s z abstractstaticmethod.__init__r r r r r r ) s r c @ s e Zd ZdZdZdS )�abstractpropertyzoA decorator indicating abstract properties. Deprecated, use 'property' with 'abstractmethod' instead. TN)r r r r r r r r r r 6 s r � )�get_cache_token� _abc_init� _abc_register�_abc_instancecheck�_abc_subclasscheck� _get_dump�_reset_registry� _reset_caches)�ABCMetar �abcc sR e Zd ZdZ� fdd�Zdd� Zdd� Zdd � Zdd d �Zd d� Z dd� Z � Z S )r! a� 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()). c s" t � j| |||f|�}t|� |S )N)r �__new__r )�mcls�name�bases� namespace�kwargs�clsr r r r# T s zABCMeta.__new__c C s t | |�S )z{Register a virtual subclass of an ABC. Returns the subclass, to allow usage as a class decorator. )r �r) �subclassr r r �registerY s zABCMeta.registerc C s t | |�S )z'Override for isinstance(instance, cls).)r )r) �instancer r r �__instancecheck__` s zABCMeta.__instancecheck__c C s t | |�S )z'Override for issubclass(subclass, cls).)r r* r r r �__subclasscheck__d s zABCMeta.__subclasscheck__Nc C s� t d| j� d| j� �|d� t dt� � �|d� t| �\}}}}t d|��|d� t d|��|d� t d|��|d� t d|��|d� d S ) z'Debug helper to print the ABC registry.zClass: �.)�filezInv. counter: z_abc_registry: z _abc_cache: z_abc_negative_cache: z _abc_negative_cache_version: N)�printr r r r )r) r1 � _abc_registry� _abc_cache�_abc_negative_cache�_abc_negative_cache_versionr r r �_dump_registryh s � �zABCMeta._dump_registryc C s t | � dS )z.Clear the registry (for debugging or testing).N)r �r) r r r �_abc_registry_cleart s zABCMeta._abc_registry_clearc C s t | � dS )z,Clear the caches (for debugging or testing).N)r r8 r r r �_abc_caches_clearx s zABCMeta._abc_caches_clear)N) r r r r r# r, r. r/ r7 r9 r: r r r r r r! G s r! c @ s e Zd ZdZdZdS )�ABCzVHelper class that provides a standard way to create an ABC using inheritance. r N)r r r r � __slots__r r r r r; } s r; )� metaclassN)r r � classmethodr � staticmethodr �propertyr �_abcr r r r r r r r � ImportErrorZ_py_abcr! r �typer; r r r r �<module> s , 6
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