Miguel Grinberg • 5/6/2026

SQLAlchemy 2 In Practice - Chapter 7: Asynchronous SQLAlchemy

This chapter from the SQLAlchemy 2 in Practice book covers asynchronous programming support in SQLAlchemy, introduced in version 1.4. It explains the concept of function coloring and the need for async code across all layers of a web application, including server, framework, route logic, SQLAlchemy session and engine, and database driver. The chapter adapts previous examples to the async model, highlighting differences like the elimination of implicit database queries. It is a technical guide for developers using SQLAlchemy with asyncio and FastAPI.

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#Python #async #orm