"Kris Schnee" <[EMAIL PROTECTED]> wrote: > I've encountered another case of variables being taken as references > rather than values.
In Python, variables are always just names. Or, said differently, "All variables are references": http://rg03.wordpress.com/2007/04/21/semantics-of-python-variable-names-from-a-c-perspective/ I tried to reproduce the problem you were having, using the following code: landList=[] SZ=10 for y in range(SZ): for x in range(SZ): if x>y: terrain = "water" else: terrain = "grass" landList.append(terrain) del terrain print landList It works as I expect (and as you were originally expecting) - landList gets filled up with both water and grass. I did notice that you were using "y" as both a coordinate and as a flag for whether the current pixel is yellow. Do you still have trouble if you don't reuse "y" in this way? -Dave LeCompte
