#Python
117 posts
Control flow — if, while, for, match-case
Flow control where blocks come from indentation, range/enumerate/zip, and match-case pattern matching that differs in feel from switch.
dataclass and __slots__
Every option of @dataclass for short, safe data classes — frozen, kw_only, field() — plus __slots__ for memory savings, all in one place.
Decorator patterns
Every shape of decorator that wraps a function — the basic form, decorators with arguments, functools.wraps, class decorators, and ParamSpec.
Descriptors and __set_name__
How property works — the __get__/__set__ protocol and data/non-data descriptors, and clean validation fields with __set_name__.
Errors and exception handling
The roles of try/except/else/finally, raise and user-defined exceptions, and the ExceptionGroup and except* introduced in 3.11.
FastAPI setup and getting started
Why FastAPI, first project setup with uv, Hello FastAPI, automatic OpenAPI/Swagger UI generation — all in one place.
Functions — argument patterns
Every tool for writing function signatures expressively — defaults, *args/**kwargs, positional-only (/), and keyword-only (*).
Getting started and uv setup
Build your first project with modern Python and uv, with type hints and the latest Python workflow from the start.
GIL and concurrency — threading vs multiprocessing vs asyncio
The identity of the GIL, the division between threading/multiprocessing/asyncio, and the free-threaded builds of Python 3.13~3.14 (PEP 703/779) — all in one place.
Iterables, generators, yield from
How for actually works. The iterable protocol, generator functions and expressions, delegation with yield from, and send/throw — all in one place.
Logging and observability
Pitfalls of the standard logging module, structured logging with structlog, distributed tracing with OpenTelemetry, and error tracking with Sentry.
Magic methods in depth and protocols
Every hook where Python objects integrate with language features. __call__, __getitem__, __hash__, __format__, __getattr__ — gathered in one place.