https://blog.rajpoot.dev/tags/python/ Recent content in Python on Manvendra Rajpoot https://blog.rajpoot.dev/img/personal/cover.png https://blog.rajpoot.dev/img/personal/cover.png Hugo en Manvendra Rajpoot Sun, 17 May 2026 17:50:46 +0530 https://blog.rajpoot.dev/cheatsheets/python/01-asyncio-essentials-cheatsheet/ Sun, 17 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/01-asyncio-essentials-cheatsheet/ asyncio essentials — event loop, tasks, gather, TaskGroup, timeouts. https://blog.rajpoot.dev/cheatsheets/python/02-type-hints-cheatsheet/ Sun, 17 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/02-type-hints-cheatsheet/ Modern Python typing — PEP 604, PEP 695, generics, protocols, TypedDict. https://blog.rajpoot.dev/cheatsheets/python/03-dataclasses-attrs-cheatsheet/ Sun, 17 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/03-dataclasses-attrs-cheatsheet/ Python dataclasses vs attrs — when each fits, frozen, slots, post_init. 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https://blog.rajpoot.dev/cheatsheets/python/15-logging-cheatsheet/ Python stdlib logging — setup, handlers, formatters, JSON output. https://blog.rajpoot.dev/cheatsheets/python/16-sets-dicts-cheatsheet/ Sun, 17 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/16-sets-dicts-cheatsheet/ Python sets and dicts cheatsheet — operations, comprehensions, common patterns. https://blog.rajpoot.dev/cheatsheets/python/17-strings-encoding-cheatsheet/ Sun, 17 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/17-strings-encoding-cheatsheet/ Python strings cheatsheet — f-strings, encoding, slicing, common methods. https://blog.rajpoot.dev/cheatsheets/python/18-exceptions-cheatsheet/ Sun, 17 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/18-exceptions-cheatsheet/ Python exception handling — try/except/finally, ExceptionGroup, custom exceptions. https://blog.rajpoot.dev/cheatsheets/python/19-testing-patterns-cheatsheet/ Sun, 17 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/19-testing-patterns-cheatsheet/ Advanced Python testing — mock, snapshot, property-based, factory. https://blog.rajpoot.dev/cheatsheets/python/20-project-setup-cheatsheet/ Sun, 17 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/20-project-setup-cheatsheet/ Modern Python project setup — uv, ruff, mypy, pytest, pyproject.toml. https://blog.rajpoot.dev/posts/python/python-data-pipelines-2026/ Tue, 05 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-data-pipelines-2026/ Python data pipelines in 2026 — Polars, DuckDB, Ibis, and the stack that's faster than pandas without leaving Python. https://blog.rajpoot.dev/posts/fastapi/fastapi-dependency-injection-2026/ Mon, 04 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-dependency-injection-2026/ FastAPI dependency injection in 2026 — DB sessions, auth, caching deps, lifecycle, and patterns from production FastAPI apps. https://blog.rajpoot.dev/posts/python/python-3-13-features-2026/ Mon, 04 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-3-13-features-2026/ Python 3.13 in 2026 — free-threaded mode, JIT, REPL improvements, and what's actually useful in production. https://blog.rajpoot.dev/posts/python/uv-deep-dive-2026/ Mon, 04 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/posts/python/uv-deep-dive-2026/ uv in 2026 — full-feature Python tooling, performance, project workflow, lockfiles, scripts, and migration from poetry / pip. https://blog.rajpoot.dev/posts/python/python-profiling-2026/ Sun, 03 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/posts/python/python-profiling-2026/ Python profiling in 2026 — py-spy for production sampling, scalene for CPU+GPU+memory, memray for memory, and the workflow for finding hot spots. https://blog.rajpoot.dev/posts/python/python-logging-2026/ Sat, 02 May 2026 11:50:00 +0530 https://blog.rajpoot.dev/posts/python/python-logging-2026/ Python logging done right in 2026 — structlog, JSON output, contextvars, correlation IDs, and the patterns from production apps. https://blog.rajpoot.dev/posts/python/python-packaging-2026/ Sat, 02 May 2026 10:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-packaging-2026/ Modern Python packaging in 2026 — uv, hatch, pyproject.toml standards, building wheels, publishing to PyPI, and the workflow that doesn't fight you. https://blog.rajpoot.dev/posts/python/python-async-patterns-2026/ Sat, 02 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/posts/python/python-async-patterns-2026/ Modern Python async patterns in 2026 — TaskGroup, asyncio.timeout, structured concurrency, anyio, and the patterns that don't leak tasks. https://blog.rajpoot.dev/posts/python/python-data-validation-2026/ Fri, 01 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/posts/python/python-data-validation-2026/ Python data validation in 2026 — Pydantic v2 vs msgspec vs attrs. Performance, ergonomics, and which fits where. https://blog.rajpoot.dev/posts/python/fastapi-background-tasks-vs-arq-2026/ Fri, 01 May 2026 05:00:00 +0530 https://blog.rajpoot.dev/posts/python/fastapi-background-tasks-vs-arq-2026/ When to use FastAPI BackgroundTasks vs a real job queue (arq, Dramatiq, Celery) in 2026 — limits, patterns, and the production rules. https://blog.rajpoot.dev/posts/python/fastapi-dependency-injection-2026/ Fri, 01 May 2026 03:40:00 +0530 https://blog.rajpoot.dev/posts/python/fastapi-dependency-injection-2026/ FastAPI dependency injection patterns for production in 2026 — typed deps, request context, lifespan resources, and the patterns that scale past one file. https://blog.rajpoot.dev/posts/python/python-uv-cookbook-2026/ Fri, 01 May 2026 01:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-uv-cookbook-2026/ Practical uv recipes for Python in 2026 — workspaces, scripts, lockfiles, Docker, CI, and the patterns that replace pip/poetry/pyenv at once. https://blog.rajpoot.dev/posts/python/python-async-database-drivers-2026/ Thu, 30 Apr 2026 23:50:00 +0530 https://blog.rajpoot.dev/posts/python/python-async-database-drivers-2026/ Async Python database drivers in 2026 — asyncpg vs psycopg async, MySQL options, SQLite (aiosqlite), and which to pick by use case. https://blog.rajpoot.dev/posts/python/python-asyncio-debugging-2026/ Thu, 30 Apr 2026 22:30:00 +0530 https://blog.rajpoot.dev/posts/python/python-asyncio-debugging-2026/ Debugging asyncio in production Python in 2026 — task leaks, blocking calls, slow callbacks, and the diagnostics that actually find them. https://blog.rajpoot.dev/posts/python/python-fastapi-websockets-realtime-2026/ Thu, 30 Apr 2026 21:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-fastapi-websockets-realtime-2026/ Building real-time features with FastAPI WebSockets in 2026 — connection management, auth, broadcast patterns, scaling, and production gotchas. https://blog.rajpoot.dev/posts/python/python-fastapi-testing-strategies-2026/ Thu, 30 Apr 2026 19:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-fastapi-testing-strategies-2026/ Testing strategies for FastAPI apps in 2026 — unit, integration, contract, end-to-end, with real DB and async-aware patterns. https://blog.rajpoot.dev/posts/python/python-3-13-features-developers-2026/ Thu, 30 Apr 2026 18:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-3-13-features-developers-2026/ Python 3.13 features for backend developers in 2026 — experimental JIT, free-threaded (no GIL) builds, REPL improvements, and what they mean for production. https://blog.rajpoot.dev/posts/python/sqlalchemy-2-deep-patterns-2026/ Thu, 30 Apr 2026 15:50:00 +0530 https://blog.rajpoot.dev/posts/python/sqlalchemy-2-deep-patterns-2026/ SQLAlchemy 2.0 production patterns in 2026 — Mapped types, async, sessions, hybrid properties, batching, and the patterns that scale. https://blog.rajpoot.dev/posts/python/django-ninja-vs-djangorest-fastapi-2026/ Thu, 30 Apr 2026 15:40:00 +0530 https://blog.rajpoot.dev/posts/python/django-ninja-vs-djangorest-fastapi-2026/ Django Ninja vs Django REST Framework vs FastAPI in 2026 — type safety, async support, performance, and how to pick by team and project. https://blog.rajpoot.dev/posts/python/python-type-hints-2026-pep-695-pep-705/ Thu, 30 Apr 2026 11:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-type-hints-2026-pep-695-pep-705/ Modern Python type hints in 2026 — PEP 695 generics, PEP 705 ReadOnly, TypedDict, Protocol, NewType, and the patterns that survive code review. https://blog.rajpoot.dev/posts/python/pydantic-v2-deep-dive-2026/ Thu, 30 Apr 2026 11:00:00 +0530 https://blog.rajpoot.dev/posts/python/pydantic-v2-deep-dive-2026/ A deep dive into Pydantic v2 — model design, validators, serializers, settings, performance, and the patterns that make it the typed-data backbone of modern Python. https://blog.rajpoot.dev/posts/python/polars-pandas-data-engineering-2026/ Thu, 30 Apr 2026 09:30:00 +0530 https://blog.rajpoot.dev/posts/python/polars-pandas-data-engineering-2026/ Why Polars replaces Pandas for production data engineering in 2026 — lazy execution, Arrow-native columnar engine, the API differences, and migration tips. https://blog.rajpoot.dev/posts/ai/structured-output-pydantic-ai-instructor-2026/ Thu, 30 Apr 2026 09:10:00 +0530 https://blog.rajpoot.dev/posts/ai/structured-output-pydantic-ai-instructor-2026/ How to get structured, validated output from LLMs in 2026 — Pydantic AI, Instructor, native tool-calling, OpenAI's structured outputs API, and the patterns that make extraction reliable. https://blog.rajpoot.dev/posts/python/background-jobs-python-arq-dramatiq-taskiq-2026/ Wed, 29 Apr 2026 10:40:00 +0530 https://blog.rajpoot.dev/posts/python/background-jobs-python-arq-dramatiq-taskiq-2026/ Modern Python background job systems compared — arq, Dramatiq, Taskiq, and where Celery still earns its keep. Patterns, retries, scheduling, and how to pick. https://blog.rajpoot.dev/posts/python/asyncio-patterns-taskgroup-anyio-2026/ Tue, 28 Apr 2026 21:10:00 +0530 https://blog.rajpoot.dev/posts/python/asyncio-patterns-taskgroup-anyio-2026/ Modern asyncio patterns in Python 3.11+ — TaskGroup, structured concurrency, exception groups, anyio for portable async, and the patterns that survived the asyncio API churn. https://blog.rajpoot.dev/posts/python/modern-python-tooling-uv-ruff-2026/ Tue, 28 Apr 2026 18:30:00 +0530 https://blog.rajpoot.dev/posts/python/modern-python-tooling-uv-ruff-2026/ The modern Python toolchain has converged in 2026 — uv for packaging, Ruff for lint+format, ty for type-checking. A practical setup that's 10–100× faster than what you used in 2023. https://blog.rajpoot.dev/posts/django/django-5-async-views-orm-channels/ Tue, 28 Apr 2026 17:10:00 +0530 https://blog.rajpoot.dev/posts/django/django-5-async-views-orm-channels/ A practical guide to async Django in 2026 — async views, the new async ORM, ASGI deployment, and how Channels fits in for WebSockets and real-time features. https://blog.rajpoot.dev/posts/fastapi/fastapi-pydantic-v2-sqlalchemy-2-production/ Tue, 28 Apr 2026 17:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-pydantic-v2-sqlalchemy-2-production/ The FastAPI stack worth building on in 2026 — Pydantic v2, async SQLAlchemy 2.0, dependency injection, settings, errors, observability, and the layout that scales past one file. https://blog.rajpoot.dev/posts/ai/anthropic-claude-api-tool-use-guide/ Tue, 28 Apr 2026 16:20:00 +0530 https://blog.rajpoot.dev/posts/ai/anthropic-claude-api-tool-use-guide/ A no-fluff guide to the Anthropic Claude API in 2026 — messages, tool use, prompt caching, structured outputs, streaming, and the patterns that ship. https://blog.rajpoot.dev/posts/ai/ai-agents-with-langgraph-tutorial/ Tue, 28 Apr 2026 16:10:00 +0530 https://blog.rajpoot.dev/posts/ai/ai-agents-with-langgraph-tutorial/ Build a real AI agent with LangGraph — tools, state, memory, conditional routing, and the production patterns that separate working agents from demoware. https://blog.rajpoot.dev/posts/devops/github-actions-cicd-for-python/ Tue, 28 Apr 2026 15:25:00 +0530 https://blog.rajpoot.dev/posts/devops/github-actions-cicd-for-python/ A practical CI/CD pipeline for Python apps with GitHub Actions — lint, type-check, test against a real Postgres, build a Docker image, and deploy. Plus matrix builds and caching. https://blog.rajpoot.dev/posts/python/celery-background-tasks-explained/ Tue, 28 Apr 2026 14:55:00 +0530 https://blog.rajpoot.dev/posts/python/celery-background-tasks-explained/ How to use Celery properly — brokers, workers, retries, idempotency, scheduling, and the patterns that don't bite you in production. https://blog.rajpoot.dev/posts/python/flask-quickstart-and-when-to-pick-it/ Tue, 28 Apr 2026 14:50:00 +0530 https://blog.rajpoot.dev/posts/python/flask-quickstart-and-when-to-pick-it/ A pragmatic Flask tutorial — set up a real app, blueprints, extensions, blueprints, and an honest take on when to still pick Flask in 2026 vs. FastAPI or Django. https://blog.rajpoot.dev/posts/devops/docker-for-python-developers/ Tue, 28 Apr 2026 14:10:00 +0530 https://blog.rajpoot.dev/posts/devops/docker-for-python-developers/ A no-fluff Docker guide for Python developers — Dockerfiles that aren't 2GB, multi-stage builds, docker-compose for local dev, and the patterns that actually scale. https://blog.rajpoot.dev/posts/django/django-vs-fastapi/ Tue, 28 Apr 2026 14:00:00 +0530 https://blog.rajpoot.dev/posts/django/django-vs-fastapi/ An honest, opinionated comparison of Django and FastAPI — what each is great at, what they're not, and how to decide which one fits your next project. https://blog.rajpoot.dev/posts/fastapi/testing-fastapi-apps/ Tue, 28 Apr 2026 13:55:00 +0530 https://blog.rajpoot.dev/posts/fastapi/testing-fastapi-apps/ How to test FastAPI applications properly — pytest setup, async test client, database isolation per test, fixtures for auth, and the patterns that scale. https://blog.rajpoot.dev/posts/fastapi/jwt-authentication-in-fastapi/ Tue, 28 Apr 2026 13:50:00 +0530 https://blog.rajpoot.dev/posts/fastapi/jwt-authentication-in-fastapi/ Build secure JWT authentication in FastAPI from scratch — password hashing, token issuing, refresh tokens, dependency-injected current user, and the security pitfalls to avoid. https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ Tue, 28 Apr 2026 13:45:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ A practical guide to wiring FastAPI to PostgreSQL with SQLAlchemy 2.0 (async), Alembic migrations, and a sane project structure. https://blog.rajpoot.dev/posts/django/django-rest-framework-tutorial/ Tue, 28 Apr 2026 13:35:00 +0530 https://blog.rajpoot.dev/posts/django/django-rest-framework-tutorial/ A hands-on tutorial for building a REST API with Django REST Framework — models, serializers, viewsets, routers, authentication, permissions, and pagination. https://blog.rajpoot.dev/posts/python/python-decorators-explained/ Tue, 28 Apr 2026 13:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-decorators-explained/ Python decorators demystified — what they actually are, how to write your own, and the patterns you'll see in real codebases. https://blog.rajpoot.dev/posts/python/async-await-explained/ Tue, 28 Apr 2026 13:10:00 +0530 https://blog.rajpoot.dev/posts/python/async-await-explained/ The mental model that makes Python's async/await actually click — what it is, what it isn't, when to use it, and the mistakes that quietly ruin async code. https://blog.rajpoot.dev/posts/python/python-virtual-environments/ Tue, 28 Apr 2026 13:00:00 +0530 https://blog.rajpoot.dev/posts/python/python-virtual-environments/ A practical comparison of uv, venv, and Poetry — what each one is great at, when to pick which, and how the Python packaging story actually works in 2026. https://blog.rajpoot.dev/posts/python/modern-python-tips/ Tue, 28 Apr 2026 12:00:00 +0530 https://blog.rajpoot.dev/posts/python/modern-python-tips/ Practical, modern Python tips drawn from real-world projects — type hints, dataclasses, pathlib, comprehensions, the walrus operator, and more. https://blog.rajpoot.dev/posts/fastapi/getting-started-with-fastapi/ Tue, 28 Apr 2026 11:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/getting-started-with-fastapi/ A practical introduction to FastAPI — the async Python framework that gives you type-safe APIs, automatic docs, and great performance with very little ceremony. https://blog.rajpoot.dev/posts/django/django-project-setup/ Tue, 28 Apr 2026 10:00:00 +0530 https://blog.rajpoot.dev/posts/django/django-project-setup/ Setting up a Django project from scratch — virtual environments, installation, startproject, startapp, and a tour of every file Django generates for you. https://blog.rajpoot.dev/posts/django/what-is-django/ Wed, 24 Jan 2024 22:36:58 +0530 https://blog.rajpoot.dev/posts/django/what-is-django/ What Django is, where it came from, why 'batteries included' matters, and what kind of websites people actually build with it. https://blog.rajpoot.dev/posts/django/django-conquered-introduction/ Wed, 24 Jan 2024 22:27:47 +0530 https://blog.rajpoot.dev/posts/django/django-conquered-introduction/ An introduction to the Django Conquered series — what it is, why I'm writing it, who it's for, and what we'll build together. https://blog.rajpoot.dev/posts/django/connect-postgresql-with-django/ Sun, 21 Jan 2024 22:14:54 +0530 https://blog.rajpoot.dev/posts/django/connect-postgresql-with-django/ A complete walkthrough for setting up PostgreSQL and wiring it up to a Django project, including environment variables, sensible defaults, and common pitfalls.