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[Python-Dev] accumulator display syntax

Alex Martelli aleaxit at yahoo.com
Mon Oct 20 11:45:36 EDT 2003 
On Monday 20 October 2003 04:30 pm, Guido van Rossum wrote:
> > We are indeed sure (sadly) that list comprehensions leak control variable
> > names.
>
> But they shouldn't.  It can be fixed by renaming them (e.g. numeric
> names with a leading dot).

Hmmm, sorry?

>>> [.2 for .2 in range(3)]
SyntaxError: can't assign to literal

I think I don't understand what you mean.


> > We can hardly be sure of what iterator comprehensions would be
> > defined to do, given they don't exist, but surely we can HOPE that
> > in an ideal world where iterator comprehensions were part of Python
> > they would not be similarly leaky:-).
>
> It's highly likely that the implementation will have to create a
> generator function under the hood, so they will be safely contained in
> that frame.

And there will be much rejoicing...!-)


Alex
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