[Python-ideas] Tweaking closures and lexical scoping to include the function being defined
arnodel at gmail.com
Wed Sep 28 07:23:42 CEST 2011
On 28 September 2011 01:56, Bruce Leban <bruce at leapyear.org> wrote:
> I proposed a special decorator-like syntax ($inject) which would pull the
> declaration out of the function entirely (putting it at the scope where it
> evaluates). There wasn't much discussion other than that it wasn't feasible
> with current implementation.
A hybrid approach would be possible, taking from both approaches
(decorator and keyword):
* a keyword to declare in the body of the function that a variable is
of the "own" kind.
* function objects would grow an __own__ attribute which is a dict-like object:
- f.__own__["i"] would return the contents of the cell that the
own variable "i" refers to
- f.__own__["i"] = 42 would set the cell contents of the own
variable "i" to 42
(or some other equivalent mechanism)
* then one could create a kind of "inject" decorator.
Here's an example:
for k, v in kwargs.items():
f.__own__[k] = v
i += 1
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