variable visiblity

[Gerhard Haering]

Gabor Nagy wrote:
> Hi!
> 
> How can I access the "parent" function's local variable from a nested
> function?
> 
> example:
> def foo(par):
> 	def f(x): print x, par
> 	f(0)
> 
> SyntaxWarning: local name 'par' in 'foo' shadows use of 'par' as global in
> nested scope 'f'
> when run, prints x, then
> ...in f NameError: global name 'par' is not defined

You're using Python 2.1. Nested scopes were introduced with Python 2.1, 
but not enabled by default, so you'll need to put a

	from __future__ import nested_scopes

on the top of your module.

Or just upgrade to Python 2.2, where nested scopes are enabled by 
default :-)

-- Gerhard