[Python-ideas] Tweaking closures and lexical scoping to include the function being defined

[Steven D'Aprano]

Yuval Greenfield wrote:
> I just want to chime in with how static variables can be bad for multi
> threaded code, yet they aren't considered as bad as global variables. E.g.
> the find_path guido example will explode if called by 2 threads in tandem. I
> believe this is more apparent and frowned upon when caused by global
> variables.

Are you saying that Guido's find_path example is thread-safe when 
written with the default argument hack, but will fail with the new proposal?


> Hasn't python given enough temptations to avoid multithreading already?

One can never have enough reasons to avoid multi-threading! <wink>

But seriously, unless this proposal makes things *worse*, I don't see 
why this is an objection.


> Allowing these fast, local, persistent static variables is like allowing
> braces instead of whitespace - the good coders will manage either way but
> the bad will do bad things with it.

That's an analogy that makes no sense to me.



-- 
Steven