[Python-Dev] nonlocal keyword in 2.x? (original) (raw)

Mike Krell mbk.lists at gmail.com
Thu Oct 22 03:56:51 CEST 2009

Is there any possibility of backporting support for the nonlocal keyword into a 2.x release? I see it's not in 2.6, but I don't know if that was an intentional design choice or due to a lack of demand / round tuits. I'm also not sure if this would fall under the scope of the proposed moratorium on new language features (although my first impression was that it could be allowed since it already exists in python 3.

One of my motivations for asking is a recent blog post by Fernando Perez of IPython fame that describes an interesting decorator-based idiom inspired by Apple's Grand Central Dispatch which would allow many interesting possibilities for expressing parallelization and other manipulations of execution context for blocks of python code. Unfortunately, using the technique to its fullest extent requires the nonlocal keyword.

The blog post is here: https://cirl.berkeley.edu/fperez/py4science/decorators.html

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