[Python-3000] iostack and Oh Oh

[Phillip J. Eby]

At 01:45 PM 12/1/2006 -0500, Jim Jewett wrote:
>Why can't your proxy be a derived class that claims to inherit
>from those same base classes, but just happens to override all the
>methods (and attributes).

Because that means you can't use generic proxy objects (e.g. zope.proxy or 
ProxyTypes).

Luckily, however, proxies can lie about their __class__ (since Python 2.3) 
and thereby fool isinstance().