Python 3 Lego Pieces:

Control operators

Creating and using functions

Builtins module data and functions

Arithmetical operators and functions: types integer, float, complex

Work with files (build-in object type)

Strings manipulation: type String

Class definitions and use

System Functions

Module Math functions

Lists : ordered collection object type

Tuples : immutable ordered object collections

Sets

Dictionaries : unordered collection object type

Date and Time

Exceptions

Modules

Operating System

Threads

Internet

TK graphics