Re: [pygame] Sticky Variables: Terrain Loading

["Dave LeCompte (really)" <dave@xxxxxxxxxxxx>]

"Kris Schnee" <kschnee@xxxxxxxxxx> 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