On 12 September 2017 at 03:32, João Matos <jcrma...@gmail.com> wrote: > Hello, > > You're correct. The idea is to give nonlocal the same ability, redirect > subsequent bindings if the variable doesn't exist.
The issue you're facing is that optimised local variables still need to be defined in the compilation unit where they're locals - we're not going to make the compiler keep track of all the nonlocal declarations in nested functions and infer additional local variables from those. (It's not technically impossible to do that, it just takes our already complex name scoping rules, and makes them even more complex and hard to understand). So in order to do what you want, you're going to need to explicitly declare a local variable in the scope you want to write to, either by assigning None to it (in any version), or by using a variable annotation (in 3.6+). Future readers of your code will thank you for making the widget definitions easier to find, rather than having them scattered through an arbitrarily large number of nested functions :) Cheers, Nick. -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
