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Tue Oct 21 16:57:03 EDT 2003 · https://mail.python.org/pipermail/python-dev/2003-October/039198.html

> I thought the definition for list comprehension syntax was something like
> 
>     '['
>         <expr> for <vars> in <expr>
>                [ for <vars> in <expr> ] *
>                [ if <expr> ] *
>     ']'
> 
> The loop <vars> in an earlier for clause should be visible in all nested for
> clauses and conditional clauses, not just in the first <expr>.

Absolutely, good point!

--Guido van Rossum (home page: http://www.python.org/~guido/)

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[Python-Dev] accumulator display syntax