Here are some recommended resources for learning the external things you need to know as a Lino developer.
Learn Python The Hard Way by Zed A. Shaw
Dive Into Python ("Python from novice to pro") is a free Python book for experienced programmers.
Think Python 2e is an introduction to Python programming for beginners.
Mike Driscoll's Python 201: A Tutorial on Threads
We try to follow the Django coding style
Python Debugging With Pdb by Nathan Jennings.
(in Estonian: Programmeerimise õpik)