Movatterモバイル変換

PEP 245

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> This is my own experiment with adapters and interfaces. I could not join> the SourceForge project, and I dont know how things are being implemented> right now. Use as you wish (even as a example of don't-do-this <wink>).The current source code is athttp://adapt.sourceforge.net/adapt.pyyou shouldn't need a IE browser to access this.  Also, the PEP isathttp://python.sourceforge.net/peps/pep-0246.html>  >>> for i in f.__adapt__(I1_Sequence): print i> ...> 1> 2> 3> 4Ok.  According to the PEP, you could write this as:  import adapt from adapt  for i in adapt(f,I1_Sequence): print iAnd then, in your FakeSequence, you should use __conform__instead of __adapt__  (__adapt__ is used in the protocol)>    def __adapt__(self, protocol):>      if protocol == I1_Sequence:>        return MakeInterfaceAdapter_V1(protocol, self, self.ir_sequence)>      elif protocol == I2_Sequence:>        return MakeInterfaceAdapter_V2(protocol, self, self.ir_sequence)>      else:>        return NoneLet's say you are now introducing an I3_Sequence, and FakeSequence is already fixed and distributed to too manyclients to be resonably changeable.  You can give theI3_Sequence class an __adapt__ method which knowsabout FakeSequence and returns the appropriate adapter.This is the bi-directional part...;) Clark

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