1. Python is very top down, so if you need something it has to either be defined
or imported above where you use it. (This differs from C#/Java)
2. Python makes code blocks on indents. Typically you indent after a colon. (C#/Java uses curly braces)
3. Python has 4 built in collections: List, Tuple, Set, Dictionary - know the differences in syntax and use.
4. Understand OOO concepts
5. Understand SOLID principles