[Tutor] : Novice Python Question

[S Potter]

To all;
 
Since this was my first time using this resource I just wanted to extend my thanks for the many responses/explanations.
I'm actually not using much of a tutorial but I will look over the links provided herein. I did make a mistake in my question post
I wasn't using a dictionary but a source list. Anyway, the explanations helped a lot I think I may actually get it now.
 
As for the macro-substitution comment I guess I should be careful not all languages handle this as I know of it.
 
ex: &VarName[.cExpression] in FoxPro
 
I assumed the concept to be the same, but that's what 'assume' gets me. Sorry;-)
 
S.
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