[Python-Dev] Metaclass problem in the "with" statement semantics in PEP 343

Nick Coghlan ncoghlan at gmail.com
Wed Nov 30 10:51:26 CET 2005

Edward Loper wrote:
> Otherwise, it seems like people might write code that relies on the 
> current behavior, which will then break if we eg turn __context__ into 
> a slot.  (It sounds like you want to reserve the right to change this.) 
>   Well, of course, people may rely on the current behavior anyway, but 
> at least they'll have been warned. :)

Yep - I thought "the instance dictionary has no effect" was an actual rule, 
but it turns out the rules are slightly looser than that (specifically, that 
fact that the effect of having a slot name in the instance dictionary is 


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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