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d S( s3 Abstract Base Classes (ABCs) according to PEP 3119.i����N( t WeakSett _Cc B s e Z RS( ( t __name__t
__module__( ( ( s /usr/lib64/python2.7/abc.pyR s c C s
t | _ | S( s� 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 Truet __isabstractmethod__( t funcobj( ( s /usr/lib64/python2.7/abc.pyt abstractmethod s t abstractpropertyc B s e Z d Z e Z RS( s/ 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)
( R R t __doc__R R ( ( ( s /usr/lib64/python2.7/abc.pyR $ s t ABCMetac B sD e Z d Z d Z d � Z d � Z d d � Z d � Z d � Z RS( si 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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d S( s& Register a virtual subclass of an ABC.s Can only register classesNs' Refusing to create an inheritance cyclei ( t
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S| j | � S| j | � p� | j | � S( s' Override for isinstance(instance, cls).t __class__N( R R R R R$ t
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