Howto generlize database descriptions?

[Danny Kohn]

Hi.
Just started with both Python and MySQL. After some initial grasping 
problems solved by assistance from this body I have a new question.

My problem, I am sure, must have been thought about many times but still I 
am not able to find a good tip for how to solve it in Python. 

Would like an effective way of creating the database with all it's tables and 
access the data tables and understand what's in the records all from one 
source. The goal is of casue to not have to change all parts of a program 
once I find that I need to change the database/table layouts. 

Guess that tuples or tuples in tuples may be a way to describe it but then, 
how efficient with the program execution be with all these references being 
used every time. I'm looking for something like define/struc in C where I can 
build my database from and then use the exact same data to access it.

Anyone that understand what I want to say and has a good solution? If so 
this newbee would appreciate a small coding example that I could 
understand, change in and expand.

/Danny Kohn