TypeError: cannot concatenate 'str' and 'NoneType' objects

[Bruno Desthuilliers]

Bruno Desthuilliers a écrit :
> thompson.marisa at gmail.com a écrit :
> 
> 4/ the Python 'for' loop is meant to iterate over an iterable and taking 
> care of boundaries, so you'd be better using it:
> 
> townships = gp.ListFeatureClasses ("*")
> for township in townships:
>   doSomethingWith(township)

Actually, forget the for loop (cf Fredrik's post - looks like 
gp.ListFeatureClasses() doesn't return an iterable...)