Caveat: I learned Python almost 20 years ago, haven't used it in 5 (I retired), and missed the whole Python 3 debacle.
Best book I found was a Python Cookbook. It presents a bunch of small problems and solves them in Python. Python itself is pretty easy to pick up but, like most languages, it can be hard to do things "the Python way". This book showed how to think like a snake.
Oblig: Guido messed up when he used whitespace as block delimiters. Should have used curly braces or somesuch. YMMV.
Thou shalt not try me. Mom 24:7
Story like this gets better after being told a few times. Or maybe it's just a tiny ad:
Devious Experiments for a Truly Passive Greenhouse!