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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.
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.
Usage:
class C(metaclass=ABCMeta):
@abstractmethod
def my_abstract_method(self, ...):
...
T)�__isabstractmethod__)�funcobj� r �(/opt/alt/python37/lib64/python3.7/abc.py�abstractmethod s r c s$ e Zd ZdZdZ� fdd�Z� ZS )�abstractclassmethodaJ A decorator indicating abstract classmethods.
Similar to abstractmethod.
Usage:
class C(metaclass=ABCMeta):
@abstractclassmethod
def my_abstract_classmethod(cls, ...):
...
'abstractclassmethod' is 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 )�abstractstaticmethodaJ A decorator indicating abstract staticmethods.
Similar to abstractmethod.
Usage:
class C(metaclass=ABCMeta):
@abstractstaticmethod
def my_abstract_staticmethod(...):
...
'abstractstaticmethod' is deprecated. Use 'staticmethod' with
'abstractmethod' instead.
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)r r r r D s z abstractstaticmethod.__init__)r r
r r r r r r r )r r r 2 s r c @ s e Zd ZdZdZdS )�abstractpropertyaf A decorator indicating abstract properties.
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 properties are overridden.
The abstract properties can be called using any of the normal
'super' call mechanisms.
Usage:
class C(metaclass=ABCMeta):
@abstractproperty
def my_abstract_property(self):
...
This defines a read-only property; you can also define a read-write
abstract property using the 'long' form of property declaration:
class C(metaclass=ABCMeta):
def getx(self): ...
def setx(self, value): ...
x = abstractproperty(getx, setx)
'abstractproperty' is deprecated. Use 'property' with 'abstractmethod'
instead.
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� 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�cls)r r r r } s zABCMeta.__new__c C s
t | |�S )z{Register a virtual subclass of an ABC.
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)r )r$ �subclassr r r �register� 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 r �__subclasscheck__� 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
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_abc_cache�_abc_negative_cache�_abc_negative_cache_versionr r r �_dump_registry� s
zABCMeta._dump_registryc C s t | � dS )z.Clear the registry (for debugging or testing).N)r )r$ r r r �_abc_registry_clear� s zABCMeta._abc_registry_clearc C s t | � dS )z,Clear the caches (for debugging or testing).N)r )r$ r r r �_abc_caches_clear� s zABCMeta._abc_caches_clear)N) r r
r r r r& r( r) r1 r2 r3 r r r )r r r p s
r c @ s e Zd ZdZdZdS )�ABCzVHelper class that provides a standard way to create an ABC using
inheritance.
r N)r r
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