callback confusion

[Donn Ingle]

> As far as I can tell, you have a bit more code in boo, and somewhere in
> that code (after the print statement), you rebind the name 'kills'.
Okay, yes:
def boo()
 kills += 1
 print kills

> the absence of a global declaration, this makes this name a local
> variable. 
I think I see what you mean:

>>> kills=0
>>> def boo():
...  kills += 1
...  print kills
...
>>> print kills
0
>>> boo()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 2, in boo
UnboundLocalError: local variable 'kills' referenced before assignment
>>> kills=77
>>> def boo(): print kills
...
>>> boo()
77

I'm amazed that I've spent so much time with Python and something like that
totally stumps me!?

> FWIW, this is a FAQ. 
If you have a link, that'll help.

\d