Raymond Hettinger <rhettin...@users.sourceforge.net> added the comment:

Fixing-up str formatting idiosyncracies does not fall under the moratorium and 
is helpful in getting 3.x to be usable.

That being said, I'm not convinced that this is actually a helpful feature.  
Not all objects supporting __getitem__ offer support for negative indexing.  
Also, there's a case to be made that using negative indices in a formatting 
string is an anti-pattern, causing more harm than good.

----------
keywords:  -after moratorium, patch
versions: +Python 3.2 -Python 3.3

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<http://bugs.python.org/issue7951>
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