Re: upvalues actually are values?

[Elias Barrionovo <elias.tandel@...>]

On Tue, Oct 23, 2012 at 7:19 PM, Coda Highland <chighland@gmail.com> wrote:
> Then you would be wrong. :P You can still consider it a closure if it
> COPIES the scope instead of REFERENCES it. The ability to modify the
> state of a closure after it's created isn't a requirement to the
> definition of a closure.

As a matter of fact, Python does not allow one to modify the closure state:

#closure.py
def new_inc()
   i =0
   def inc(n):
        i += n
        return i
    return inc

inc1 = new_inc()
print(inc1(2))

Traceback (most recent call last):
  File "closure.py", line 9, in <module>
    print(inc1(1))
  File "closure.py", line 4, in inc
    i += n
UnboundLocalError: local variable 'i' referenced before assignment

-- 
NI!