Python Developer Roadmap

What Python is, why it is so popular, and how to install it and run your first script.

venv, pip and requirements.txt, and a look at modern tools like uv and poetry.

Variables, indentation-based blocks, core types, lists, tuples, dicts, sets, comprehensions and slicing.

Defining functions, default and keyword arguments, *args/**kwargs, classes, inheritance and dunder methods.

try/except/else/finally, raising and re-raising, custom exception classes, and exception chaining with raise...from.

Reading and writing files with with, pathlib and JSON, and organizing code into modules and packages with __init__.py.

Generators, decorators, context managers, and an honest look at the GIL and when asyncio or multiprocessing help.

What Git is, installing it, the three areas, and making your first commit.

What SQL is, the relational model, and the users/orders/products schema used throughout this section.

INNER, LEFT, RIGHT, and FULL joins explained with examples, plus self-joins.

What PostgreSQL is, why teams choose it over MySQL, and connecting via psql.

1NF, 2NF, and 3NF explained with a before/after example, and when to deliberately denormalize.

What FastAPI is, installing it with Uvicorn, your first app, and the automatic /docs page.

Pydantic request models, automatic validation errors, field constraints, and response models.

OAuth2PasswordBearer, issuing and validating JWTs, and a complete protected-route example.

What Django is, installing it, starting a project, the project/app distinction, and the dev server.

Defining models, migrations, the ORM query API, and ForeignKey/ManyToMany relationships.

Installing DRF, ModelSerializer, and a complete ViewSet + router example for a JSON API.

What Flask is, how it compares to Django, and how to install it and run your first app.

Writing test functions, asserting raised exceptions, fixtures for setup/teardown, and parametrized tests.

TestClient, and a complete endpoint test using a mocked dependency via dependency_overrides.

What containers are, how they differ from VMs, installing Docker, and your first container.

Running Uvicorn workers or Gunicorn+Uvicorn workers in production, with a Dockerfile example.

Real Python interview questions and answers covering fundamentals, data structures, concurrency and decorators.