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Latest articles

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Cover image for Calling LLMs from Python: The Request Loop, Tokens, Cost, and Retries

6 hours ago 4

AI & LLM

Calling LLMs from Python: The Request Loop, Tokens, Cost, and Retries

Call language models from Python with the Claude SDK: the messages loop, tokens and cost, and a client with timeouts and retries you can inject and test.

6 hours ago 9

Python

Type-Safe Data Modeling with Pydantic v2 and Python Type Hints

Use Pydantic v2 to validate data at the boundary: models, field constraints, custom validators, and clean serialization, the backbone of FastAPI and reliable LLM output.

6 hours ago 8

Python

Async Python Deep Dive: asyncio, httpx, and Concurrency for API and LLM Calls

Understand asyncio and the event loop, then fan out API and LLM calls concurrently with httpx, gather, and a semaphore to bound load.

6 hours ago 6

FastAPI

FastAPI Fundamentals: Routing, Pydantic Models, and Dependency Injection

Build real FastAPI endpoints: typed routing, Pydantic request and response models, dependency injection, and automatic docs.

6 hours ago 8

FastAPI

FastAPI in Production: Settings, Auth, Middleware, and Project Structure

Harden a FastAPI app for production: typed settings with pydantic-settings, bearer auth, logging and CORS middleware, and a scalable project structure.

6 hours ago 4

FastAPI

Streaming and Background Work in FastAPI: SSE and BackgroundTasks

Stream responses from FastAPI with server sent events, run side effects with BackgroundTasks, and know when to move to a real task queue.

6 hours ago 4

FastAPI

Testing FastAPI the Right Way: pytest, the Test Client, and Validation

Test FastAPI with pytest and the test client: assert on validation, override dependencies to isolate from real services, and cover async and streaming code.

Cover image for Streaming LLM Responses to the Browser with FastAPI and SSE

6 hours ago 4

AI & LLM

Streaming LLM Responses to the Browser with FastAPI and SSE

Stream a real model response to the browser: consume the model stream in Python, forward it through a FastAPI SSE endpoint, and render it live.