[Python-Dev] PEP for Better Control of Nested Lexical Scopes (original) (raw)

Guido van Rossum guido at python.org
Sat Feb 25 01:48:23 CET 2006


On 2/24/06, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:

Jeremy Hylton wrote: > The more practical complaint is that list comprehensions use the same > namespace as the block that contains them. > ... but I suspect we're stuck with the > current behavior for backwards compatibility reasons.

There will be no backwards compatibility in 3.0, so perhaps this could be fixed then?

Yes that's the plan. [f(x) for x in S] will be syntactic sugar for list(f(x) for x in S) which already avoids the scope problem.

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



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