[Python-ideas] Explicit variable capture list

[David Mertz]

On Sat, Jan 23, 2016 at 8:54 AM, Guido van Rossum <guido at python.org> wrote:

> Also, once again the semantics of lambda (specifically, that unlike
>>
> def it doesn't create a scope)
>
>
> Uh, what? I can sort of guess what you are referring to here (namely, that
> no syntactic construct permissible in a lambda can assign to a local
> variable -- or any variable, for that matter).
>

That's not even quite true, you can assign to global variables in a lambda:

>>> myglobal = 1
>>> f = lambda: globals().__setitem__('myglobal', 2) or 42
>>> f()
>>> myglobal
2


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