Create a map for data to flow through

[Sayth Renshaw]

Is there a standard library feature that allows you to define a declarative map or statement that defines the data and its objects to be parsed and output format?

Just wondering as for loops are good but when i end up 3-4 for loops deep and want multiple matches at each level i am finding it harder to manage. I am reading here https://docs.python.org/3/howto/functional.html

Is there a better way than loops on loops on loops etc?

Thinking that for loop is quick at the start but there probably is a more direct way which while slower may be clearer over the long run.

Cheers 

Sayth