Waldemar Osuch
1/9/2008 10:52:00 PM
On Jan 9, 11:47 am, "Steven W. Orr" <ste...@syslang.net> wrote:
> So sorry because I know I'm doing something wrong.
>
> 574 > cat c2.py
> #! /usr/local/bin/python2.4
>
> def inc(jj):
> def dummy():
> jj = jj + 1
> return jj
> return dummy
>
> h = inc(33)
> print 'h() = ', h()
> 575 > c2.py
> h() =
> Traceback (most recent call last):
> File "./c2.py", line 10, in ?
> print 'h() = ', h()
> File "./c2.py", line 5, in dummy
> jj = jj + 1
> UnboundLocalError: local variable 'jj' referenced before assignment
>
> I could have sworn I was allowed to do this. How do I fix it?
>
I have seen this approach on ActiveState Cookbook but can not find a
reference to it right now.
>>> def inc(jj):
.... def dummy():
.... dummy.jj += 1
.... return dummy.jj
.... dummy.jj = jj
.... return dummy
....
>>> h = inc(33)
>>> h()
34
>>> h()
35
>>> i = inc(12)
>>> i()
13
>>> i()
14
Waldemar