twisted.python.components.Interface

Package twisted :: Package python :: Module components :: Class Interface

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Class Interface

object --+
         |
        Interface

Known Subclasses:: IResource

Base class for interfaces.

Interfaces define and document an interface for a class. An interface class's name must begin with I, and all its methods should have no implementation code.

Objects that implement an interface should have an attribute __implements__, that should be either an Interface subclass or a tuple, or tuple of tuples, of such Interface classes.

A class whose instances implement an interface should list the interfaces its instances implement in a class-level __implements__.

For example:

   | class IAdder(Interface):
   |     'Objects implementing this interface can add objects.'
   |
   |     def add(self, a, b):
   |         'Add two objects together and return the result.'
   |
   | class Adder:
   |
   |     __implements__ = IAdder
   |
   |     def add(self, a, b):
   |         return a + b

You can call an Interface with a single argument; If the passed object can be adapted to the Interface in some way, the adapter will be returned.

Method Summary
	`adaptWith(self, using, to, registry)` (Class method)
Inherited from object
	`__init__(...)` x.__init__(...) initializes x; see x.__class__.__doc__ for signature
	`__delattr__(...)` x.__delattr__('name') <==> del x.name
	`__getattribute__(...)` x.__getattribute__('name') <==> x.name
	`__hash__(x)` x.__hash__() <==> hash(x)
	`__reduce__(...)` helper for pickle
	`__reduce_ex__(...)` helper for pickle
	`__repr__(x)` x.__repr__() <==> repr(x)
	`__setattr__(...)` x.__setattr__('name', value) <==> x.name = value
	`__str__(x)` x.__str__() <==> str(x)
Inherited from type
	`__new__(T, S, ...)` T.__new__(S, ...) -> a new object with type S, a subtype of T

Class Variable Summary
`type`	`__metaclass__` = `twisted.python.components.MetaInterface`

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