Benjamin Peterson <benja...@python.org> added the comment:

2010/12/25 Sven Brauch <rep...@bugs.python.org>:
>
> Sven Brauch <svenbra...@googlemail.com> added the comment:
>
> Well, weather it's supposed to or not, it *does* contain the line number 
> information:
> <ExprAst lineno="1" col_offset="0">
> For your example, the AST for "foo" tells you the offset for foo. If you want 
> to know the offset (well, "offset") for blah, why not look at foo? Currently, 
> the information is just copied from foo to blah.

What if it's like this, though?

x = (    foo).blah

>
> Anyway, I'd like to get away from this abstract discussion which is not 
> likely to yield a result... is there any reason not to do it like I suggested 
> other than the philosophical "it's wrong"? Or don't you agree that the 
> information given this way would be more useful?

It wouldn't be any more useful than it is now. I don't think it's
reasonably possible to preserve every last obscure formatting in ast.

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<http://bugs.python.org/issue10769>
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