
If you do nothing else, master these five things:
1. Data structures. Lists, dicts, sets, and tuples. Know when to use each. This is 80% of daily Python.
2. Functions & comprehensions. Write clean, readable functions. Use list/dict comprehensions instead of verbose loops. This is what makes code "Pythonic."
3. File I/O & error handling. Every real program reads/writes files and handles errors. Master the with statement and try/except.
4. One library deeply. Pick your path: requests (APIs), pandas (data), flask (web), or pytest (testing). Go deep on one before branching out.
5. Build something real. Pick a project you actually care about. A tool that automates something annoying. A simple web scraper. A personal finance tracker. The gap between "knowing Python" and "being a Python developer" is building real things.
Resources: Official docs (docs.python.org), Real Python (realpython.com), Python Cookbook by Beazley & Jones, Fluent Python by Luciano Ramalho.
Reference:
TaskLoco™ — The Sticky Note GOAT