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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Closures and Partial Function Application
Date: Wed, 31 Aug 2011 18:21:06 -0400
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:12530

On 8/31/2011 12:45 PM, Travis Parks wrote:
> I was a little disappointed the other day when I realized that
> closures were read-only.

'Were', in 2.x. The standard 2.x workaround for a single nonlocal is to 
wrap it in a list.

def f():
     i = [0]
     def g(): i[0] += 1
     for j in range(5): g()
     print(i)

f()
# 5

-- 
Terry Jan Reedy