help with NameError

[Torsten Marek]

Shadri Shah schrieb:
> Hello,
> 
> I request help in understanding why I'm getting NameError here in the code below:
> 
> import re
> 
> def t(s):
>     k = []
>     
>     def g(j):
>         global k
>         k.append(j.group(0))
>         return 'p'
>     
>     re.sub('f',g,s)
>     
>     print k
> 
> if __name__ == "__main__":
>     t('abc f xyz f')
> 

"global k" searches a symbol k at global scope, and there isn't any "k"
defined. You access k, just leave out "global k". For further
information, read something about nested scopes, either on the list
(there's plenty about it), or in the python doc.

Torsten