Python 3 removes name binding from outer scope
Steve D'Aprano
steve+python at pearwood.info
Tue Jul 25 20:20:55 EDT 2017
On Wed, 26 Jul 2017 06:06 am, Chris Angelico wrote:
> Hmm. Aside from messing around with exec, is there any way to have a
> local and a global with the same name, and use the global?
Use globals['name'].
There's no way to do it with regular name look ups. This doesn't work:
spam = 'outside'
def func():
spam = 'inside'
assert spam == 'inside'
global spam
assert spam == 'outside'
The problem is that global is a declaration, not an executable statement, and if
it is *anywhere* inside function, it is deemed to apply to the entire function.
Apart from that, you could try hacking the byte-code. It should be a matter of
just replacing LOAD_FAST with LOAD_GLOBAL, I think.
--
Steve
“Cheer up,” they said, “things could be worse.” So I cheered up, and sure
enough, things got worse.
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