nested data structures with classes
jfmoxley at mit.edu
Sun Aug 24 22:08:46 CEST 2003
[sent to python-list at python.org at Sun, 24 Aug 2003 13:31:58 but
didn't seem to show up here]
The good news is that I've been having a blast with Python since early
Spring. I've had great success in both learning the language from
online / usegroup resources and implementing it in one of my projects.
However, I can't pretend to be an expert, and I do not have a strong
comp sci background.
This is a question that I've had for a while. Usually, I'll stumble
across the answer with repeated attempts and re-searching the groups,
but I didn't have luck with this one, even in a Dietel book I picked
up at the library. I'm assuming there's an obvious answer, so maybe
ya'll can save me some time.
My Python use involves organizing nested list information. In a
simplified example, you could imagine a list of reactants and products
in a chemical reaction. Thus,
len(nested_list_of_reactants) = len(nested_list_of_products) =>
"number of reactions"
where: nested_list_of_reactants[i] => "list of reactants for reaction
where: nested_list_of_reactants[i][j] => "reactant j of reaction i"
And so forth. Obviously, there are many attributes associated with a
specific reaction. Currently, I just pass these attribute lists
(nested and non-nested) into and out of functions. However, I'd like
to be able to create a class that would streamline this.
E.g., (this is a MATLAB structure whose qualities I'd like to
reaction(27).name = 'fawlty towers'
reaction(27).reactant(2).name = 'john cleese'
Currently, I'd have a list and a nested list to take care of this...
reaction_name = 'fawlty towers' and reactants = 'john
cleese' if this makes sense.
Any thoughts or suggestions on this type of data structuring would be
greatly appreciated. Python love, Joel
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