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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.
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    class that has a metaclass derived from ABCMeta cannot be
    instantiated unless all of its abstract methods are overridden.
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    'super' call mechanisms.  abstractmethod() may be used to declare
    abstract methods for properties and descriptors.
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    T)�__isabstractmethod__)�funcobj� r   �/usr/lib64/python3.9/abc.py�abstractmethod   s    r   c                       s$   e Zd ZdZdZ� fdd�Z�  ZS )�abstractclassmethoda  A decorator indicating abstract classmethods.
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�  ZS )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()).
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