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If you're talking about the following: 
"""
Note that \function{super} is implemented as part of the
binding process for explicit dotted attribute lookups such
as \samp{super(C, self).__getitem__(name)}.  Accordingly,
\function{super} is undefined for implicit lookups using
statements or operators such as \samp{super(C, self)[name]}. 
""" 
I believe it's trying to say that super works as if it only
overrode __getattr__. Hence ``sup.XXX`` works, but not
``sup[...]``, ``sup(...)``, etc.  That first sentence seems
mostly unnecessary to me.  As long as we say that the
__XXX__ methods must be spelled out explicitly, I think
we've got our bases covered.