Hi,
The following might be documented somewhere, but it hit me unexpectedly
and I couldn't exactly find this in the manual either.
Problem is, that I cannot use augmented assignment operators in a
nested scope, on variables from the outer scope:
PythonWin 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit
(Intel)] on win32.
Portions Copyright 1994-2004 Mark Hammond ([EMAIL PROTECTED]) -
see 'Help/About PythonWin' for further copyright information.
>>> def foo():
... def nestedfunc(bar):
... print bar, ';', localvar
... localvar += 1
... localvar=0
... nestedfunc('bar')
...
>>> foo()
bar =Traceback (most recent call last):
File "<interactive input>", line 1, in ?
File "<interactive input>", line 6, in foo
File "<interactive input>", line 3, in nestedfunc
UnboundLocalError: local variable 'localvar' referenced before
assignment
>>>
This is entirely counter-intuitive to me, and searching the manual for
nested scoping rules and for augmented assignment rules, I still feel
that I couldn't have predicted this from the docs.
Is this an implementation artifact, bug, or should it really just
follow logically from the language definition?
Regards,
--Tim
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