Eugene Toder added the comment:

> Method calls on literals are always fair game, though (e.g. you could 
> optimise "a b c".split())
What about optimizations that do not change behavior, except for different 
error messages? E.g. we can change
y = [1,2][x]
to
y = (1,2)[x]
where the tuple is constant and is stored in co_consts. This will, however, 
produce a different text in the exception when x is not 0 or 1. The type of 
exception is going to be the same.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11549>
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