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|_c@s}dZddlZddlmZdddYZeeZdZdefdYZ	d	efd
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dS(s3Abstract Base Classes (ABCs) according to PEP 3119.iN(tWeakSett_CcBseZRS((t__name__t
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t|_|S(sA 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
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    The abstract methods can be called using any of the normal
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    (tTruet__isabstractmethod__(tfuncobj((s/usr/lib/python2.7/abc.pytabstractmethods	tabstractpropertycBseZdZeZRS(s/A decorator indicating abstract properties.

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        class C:
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            @abstractproperty
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                ...

    This defines a read-only property; you can also define a read-write
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    (RRt__doc__RR(((s/usr/lib/python2.7/abc.pyR$stABCMetacBsDeZdZdZdZdZddZdZdZ	RS(siMetaclass for defining Abstract Base Classes (ABCs).

    Use this metaclass to create an ABC.  An ABC can be subclassed
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    ABCs as 'virtual subclasses' -- these and their descendants will
    be considered subclasses of the registering ABC by the built-in
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