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ÇÉŽJc @ s? d Z d „ Z d e f d „ ƒ YZ d e f d „ ƒ YZ d S( s3 Abstract Base Classes (ABCs) according to PEP 3119.c C s
t | _ | S( só 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 the normal
'super' call mechanisms.
Usage:
class C:
__metaclass__ = ABCMeta
@abstractmethod
def my_abstract_method(self, ...):
...
( t Truet __isabstractmethod__( t funcobj( ( s /usr/lib/python2.6/abc.pyt abstractmethod s t abstractpropertyc B s e Z d Z e Z RS( s3 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 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)
( t __name__t
__module__t __doc__R R ( ( ( s /usr/lib/python2.6/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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( ( s /usr/lib/python2.6/abc.pyR N s ! c C sx t | t ƒ p t d ƒ ‚ n t | | ƒ o d St | | ƒ o t d ƒ ‚ n | i i | ƒ t i d 7_ d S( s& Register a virtual subclass of an ABC.s Can only register classesNs' Refusing to create an inheritance cyclei ( t
isinstancet typet TypeErrort
issubclasst RuntimeErrorR R R R ( R t subclass( ( s /usr/lib/python2.6/abc.pyt registera s c C s† | d | i | i f IJ| d t i IJxT t | i i ƒ ƒ D]= } | i d ƒ o' t | | ƒ } | d | | f IJqA qA Wd S( s' Debug helper to print the ABC registry.s Class: %s.%ss Inv.counter: %st _abc_s %s: %rN( R R R R t sortedt __dict__t keyst
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| d j o6 | i t i j o | | i j o t S| i
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| ƒ S( s' Override for isinstance(instance, cls).t __class__N( R R R R R" R R R R R
t __subclasscheck__( R t instanceR& t subtype( ( s /usr/lib/python2.6/abc.pyt __instancecheck__x s
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t __subclasshook__t NotImplementedR! t boolt AssertionErrorR R R R$ t __subclasses__( R R& t okt rclst scls( ( s /usr/lib/python2.6/abc.pyR0 ‰ s:
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R R R R R R' R R. R3 R0 ( ( ( s /usr/lib/python2.6/abc.pyR 9 s N( R R t propertyR R" R ( ( ( s /usr/lib/python2.6/abc.pyt <module> s