PEP idea. ( removing __slots__ )

[simon place]

Removing  __slots__
~~~~~~~~~~~~~~~~~~~

To do this nicely requires the renaming of  __dict__ to, say, 
__attribs__ , ( since dict is unnecessarily unspecific, this seem like a 
small improvement in itself. ) then using the setting of __attribs__ to 
a non-mutable type (ie  tuple of attribute names)  to indicate the 
behaviour of __slots__, rendering it unnecessary, this I think is a good 
simplification.